Hardware

Physically speaking, the Surface Pro 3 has more in common with the Surface 2, which runs Windows RT, than with previous Surface Pros. This year, Microsoft ditched the old carbon-black color in favor of a more playful silver, though the chassis itself is still made of sturdy magnesium alloy, with chamfered edges making it easy to wrap your fingers around. It's not just the color, though, that makes me think of the Surface 2: The Surface Pro 3 measures just 0.36 inch thick, making it only a tad fatter than the Windows RT model; that guy comes in at 0.35 inch wide. This is stunning when you remember the Surface 2 is a traditional tablet, comparable to the iPad, whereas the Surface Pro is basically an Ultrabook without a built-in keyboard. In fact, Microsoft says this is the thinnest machine with an Intel Core i7 processor. It may also be the lightest too, at 1.76 pounds. And even if it's not, it's still a meaningful improvement -- both the first- and second-generation Surface Pros weighed two pounds.

The Surface Pro's thinness seems even more impressive when you compare it to its peers: full-fledged Ultrabooks. Most 13-inch Ultras come in at around three pounds and half an inch thick (if they're lucky). Even the 11-inch MacBook Air, which benefits from a smaller footprint, tips the scales at 2.38 pounds. Next to those systems, the Surface Pro 3 is impossibly compact. In fact, I was loath to go back to my 13-inch MacBook Air after my review was over; the new Surface is just so much lighter. Truly, why can't all Ultrabooks be this easy to carry?

As a tablet, of course, the Surface Pro still doesn't feel particularly light; you don't just forget what it feels like to use a lighter device like the iPad Air. That said, it's definitely lighter than a 12-inch tablet has any right to be. Also, there's this: Despite that bigger screen -- or maybe because of it -- the Surface Pro 3 handles better than its predecessors. For one thing, blowing up the screen size actually allowed Microsoft to slim down the proportions. Think about it: With more internal space to work with, the engineers were able to rearrange the components, laying some items side by side instead of stacking them on top of each other. The result is a substantially thinner device that might not have been possible had Microsoft stuck with a 10.6-inch screen size.

Additionally, the new Surface Pro has a different aspect ratio: 3:2, instead of the usual 16:9. During his keynote, Panay said the company was actively trying to mimic the dimensions of a legal pad, the sort of object humans are already used to holding, and working with. It was a smart move, I think: With this new shape, the tablet feels less top-heavy in portrait mode, and it's easier to reach things with your thumbs in landscape. Goes to show that weight reduction isn't everything (though it definitely helps).

As it is, the Surface 2 and Surface Pro 2 have dual-stage kickstands that can be arranged in one of two positions. The Surface Pro 3 goes a step further -- literally -- with an option to pull out the kickstand at a near-flat 150-degree angle. This is useful if you're playing a board game or using a drawing app, and an upright angle won't do. All in all, too, the kickstand feels well-built, if a little rigid. Granted, I wouldn't want the hinge to move so easily that it verges on snapping off. But the kickstand here is so tightly wound that I actually feel a bit naughty every time I push it back into that 150-degree position; there's so much friction that when I push the stand back, I feel like I'm doing something I'm not supposed to. It's also still a bit awkward to pull the kickstand out, since there's only a notch on one side of the tablet. Again, though, it feels durable, and still makes that soft "click" sound every time you snap it shut.

Despite the bigger size, the port selection is the same as ever. That means: a power button on the top landscape edge; a Mini DisplayPort and USB 3.0 connection on the right; and a volume rocker and headphone jack on the left. The bottom, of course, is home to the magnetic guides that allow it to click into the optional Type Cover keyboard (more on that in a moment). There's also a microSD slot tucked under the kickstand, supporting cards as large as 128GB. Microsoft also upgraded the cameras so that both go up to 5-megapixel resolution. Meanwhile, there's a proprietary charging port on the right side, just below the USB socket. Though the charger stays put, it's still awkward to insert -- a minor annoyance you'll surely get used to, should you choose to buy this. As for the front-facing speakers, said to be 45 percent louder than last year's model, they pass my "Dolly Parton rundown test" with flying colors. (They make other kinds of music sound good, too.)

Display and pen input

The Surface tablets have always had lovely displays, and the third-gen Pro is no exception. What we have here is a 12-inch, 2,160 x 1,440 IPS panel, with text so sharp you'd have to put your nose up against the screen to see any pixels. Colors are punchy, but balanced, and the viewing angles are good too, though even a low-glare screen like this isn't immune to reflections from overhead light. In general, I had little trouble reading the screen, but using the Surface in my lap was sometimes challenging; the most stable kickstand position doesn't necessarily mean the best viewing angles.

Under the hood, Microsoft used some different pen technology this time around: an active digitizer made by N-trig, as opposed to Wacom. While it might sound like I'm harping on specs there, hear me out: You'll be making some trade-offs. On the one hand, Wacom's digitizer offered more nuanced pressure sensitivity: 1,024 degrees, versus 256 from N-trig. On the other hand, N-trig's setup allows for a thinner glass display and thus, a slimmer overall design. Additionally, N-trig's pen was designed to feel more like a proper, ink-based pen, and is therefore more natural to hold. Likewise, the screen has just enough friction that drawing on it feels more like dragging a pen across a pad of paper -- or as close as you can get, anyway. Personally, I'd choose a thinner, lighter device over more precise pressure sensitivity, but hey, don't let me set your priorities for you.

As you're using the pen, you'll notice it does some old tricks, along with some new ones too. It supports hovering, for instance, and you can use the top button as an eraser in select apps. On a more surprising note, you can press that top button to wake the tablet from sleep, at which point OneNote will open above the lock screen. Kind of like how you can already use the camera app from the Windows 8.1 lock screen. Also, OneNote now sends your scribbles to the cloud as you're writing them -- not unlike how you'd expect Google Drive to immediately save your work.

As with previous Surface devices, there's no place on the tablet to stow the pen. Rather, you're supposed to slip it inside a loop that attaches to either the Surface or the optional Type Cover keyboard. Unfortunately, the thing fell off after just a few days of use, which means you're probably on your own when it comes to making sure you don't lose your writing implement.

Typing experience

Just so you know, I'm typing this sentence from a Surface Pro 3. The thing is sitting in my lap, even. And you know what? I'm doing alright. This isn't my favorite laptop keyboard -- not by a long shot -- but I'm doing OK. And I think you will too. But before I get ahead of myself, let me explain what you're getting here. The first thing you should know, perhaps, is that there's just one keyboard option: a backlit Type Cover keyboard built specifically for the Surface Pro 3's bigger frame. For now, at least, the flat Touch Cover keyboard is not an option. Frankly, I always preferred the physical buttons anyway, just because the learning curve is so much smaller. The only thing you'll miss, maybe, is the Touch Cover's lighter-weight design. But given the choice, I'll take a more natural typing experience over a lighter keyboard any day. And hey, the tablet's already pretty light; you can deal with a few extra ounces.

What I like best about this new keyboard is that I don't have to type on a completely flat surface if I don't want to. Unlike previous Type Covers, this one has a magnetic strip on the top, allowing you to fold up the upper piece of the keyboard so that it attaches firmly to the tablet's lower bezel. The end result is sort of a wedge profile, similar to what you'd find on a proper laptop. And it goes a long way in making the thing more comfortable to use. Mind you, nobody's forcing you to pick the propped-up option; you can go flat if you want to. I just don't understand why anyone would.

The problem is that the keyboard is flimsy, and it's nowhere as sturdy or comfortable as "real" keyboards. As I type this, I can see the keyboard cover giving a bit under the weight of my fingers; it's enough to make me not want to use it in my lap (though I do it anyway, out of necessity). With every keystroke, I make a loud "clack," letting anyone around me know I'm getting stuff done. The keys are also bunched close together -- the opposite of your standard chiclet layout. That means it's a little too easy to hit the wrong key. Luckily for me, I have a copy editor, so you can't tell how many typos I actually made while writing this review. Suffice to say, it was enough that I eventually started to type more gingerly, in the hopes I wouldn't make quite as many mistakes.

The Surface Pro 3's Type Cover also brings an improved touchpad. And that's good timing, because the latest Windows 8.1 update made the OS much more mouse-and-keyboard friendly. In brief, the trackpad here is bigger, with a built-in touch button you can press down on. It's also said to be more responsive, but I'll be the judge of that, not Microsoft. Even if the trackpad is more precise than it used to be, it's still many steps behind the sort of glass touchpad you'd find on the MacBook Air or many Windows Ultrabooks. It sometimes takes multiple tries to get two-finger scrolling to work. Ditto for clicking and dragging windows and other objects around the screen. Other times, I accidentally navigated backward out of a web page when I was really trying to do some other sort of gesture. If you're serious about having a mouse, especially in desktop mode, you might be better off using a Bluetooth one, especially if you intend the Surface Pro to be your daily driver.

Performance and battery life

Make no mistake: When it comes to performance, the Surface Pro has always been able to go head to head with traditional laptops. Still, it's nice to know that as other Ultrabooks have experienced modest performance gains, Microsoft has kept pace. Armed with a Haswell processor (a 1.9GHz Core i5-4300U chip), 8GB of RAM, a Samsung-made solid-state drive and the usual Intel HD 4400 graphics, the Surface Pro 3 holds its own in synthetic benchmark tests, with scores that fall in line with the competition. It also boots quickly, taking just 10 seconds to get to the lock screen and then one more to load the Start Screen. My WiFi connection was consistently fast too, thanks to the 802.11ac radio inside (there's also Bluetooth 4.0, if you need it).

Accordingly, the Surface Pro 3 can do everything an Ultrabook can do. One of my favorite things about working on a Windows machine is the Snap feature, so I routinely have two programs laid out side by side -- usually Chrome and HipChat. In particular, I often have a dozen tabs open at once, including Gmail, my calendar, Engadget, Facebook, Twitter and the publishing software we use to write stories, not to mention the odd Wikipedia page and music-streaming service. In addition to the usual multitasking, you could also edit photos if you wanted, or maybe even cut together some video.

Throughout, the metal surfaces stayed relatively cool, and I didn't hear much noise coming out of the thin vent that surrounds the perimeter of the device. As with every other Ultrabook, though, the new Surface wheezes a bit during gameplay. Load up a game and the thing gets quite warm -- almost hot -- to the touch. Hot and noisy, too. At one point, the fans started exhaling so loudly that I heard them even in a loft space with various coworkers milling around nearby. If I can hear it over all that ambient noise, well, that's not good. Fortunately, it takes a lot to make the system pipe up like that. And if you do, it could be that you're doing something Ultrabooks weren't actually designed for.

Battery life Microsoft Surface Pro 3 7:08 MacBook Air (13-inch, 2013) 12:51 MacBook Pro with Retina display (13-inch, 2013) 11:18 Sony VAIO Duo 13 9:40 Samsung ATIV Book 9 Plus 8:44 HP Spectre 13 8:30 Sony VAIO Pro 13 8:24 Lenovo IdeaPad U430 Touch 7:53 Acer Aspire S7-392 7:33 Acer Iconia W700 7:13 Sony VAIO Pro 11 6:41 Lenovo IdeaPad Yoga 2 Pro 6:32 Microsoft Surface Pro 2 6:27 Lenovo ThinkPad X1 Carbon (2014) 6:18 Lenovo IdeaPad Yoga 13 5:32 Lenovo ThinkPad X1 Carbon (2013) 5:07 Lenovo ThinkPad X1 Carbon Touch (2013) 5:00 Samsung ATIV Book 9 Lite 4:33

Microsoft describes the Surface Pro 3's battery life in two ways: You can get up to nine hours of web surfing (WiFi on, auto-brightness turned off), or you can simply expect a 15 to 20 percent increase over previous models. Translation: Your mileage will vary, but battery life will be improved either way. And improved it is. In our video-looping test (also with WiFi on and auto-brightness disabled), the tablet managed seven hours and eight minutes. Compare that with the Surface Pro 2, which couldn't crack six and a half hours.

Now, let's put that seven-hour battery life in context. In short, it's not great, but it's not bad, either. Other ultraportables that are either small in size or super lightweight have tended to last a similar amount of time (see: the Acer Aspire S7-392 or the Sony VAIO Pro 11). Even some larger Ultrabooks, like Lenovo's Yoga 2 Pro and ThinkPad X1 Carbon, deliver less runtime despite having room for bigger batteries. The thing is, of course, there are many Ultrabooks that last much, much longer on a charge. The HP Spectre 13, Sony VAIO Pro 13, Sony Duo 13 and Samsung ATIV Book 9 Plus all last around eight and half hours, if not closer to 10. (The MacBook Air can go even longer, though I've never tested the 11-inch model.)

Though the Surface Pro 3 is lacking in battery life compared to larger Ultrabooks, it at least charges quickly. After pushing the battery to its limits, I got back up to 72 percent in around 90 minutes. So, even if you only have a short time to recharge, you should still recover enough juice to last you through a couple hours of work. And by the time that runs out, you probably will have found another outlet.

Update: After continued testing, we started to get even higher benchmark scores for the Surface Pro 3. We've updated the above benchmark table to include those.

Configuration options and the competition

The Surface Pro 3 can be either sorta expensive or really expensive, depending on the specs you choose. At the low end, there's a Core i3 model with 64GB of storage, priced at $799. The next step up is a Core i5 configuration with 128GB of storage; that'll sell for $999. To get that same Core i5 unit with 256GB of storage instead, you'll pay $1,299. Rounding out the list are two Core i7 models: one with 256GB of storage and the other with 512GB. Those will cost you $1,549 and $1,949, respectively. As of this writing, the two Core i5 models were slated to ship on June 20th. The Core i3 and Core i7 configurations, meanwhile, aren't shipping until August 31st, according to Microsoft's online store. Either way, you can pre-order any of them now, if you like.

Unfortunately, whichever you pick, the $130 Type Cover keyboard is sold separately, which means the Surface Pro 3 immediately suffers in comparisons with proper Ultrabooks, like the Yoga 2 Pro ($1,199), Dell XPS 12 ($1,000), Acer Aspire S7-392 ($1,300) and the Samsung ATIV Book 9 Plus ($1,400). For instance, if you wanted the Surface Pro 3 with a Core i5 processor, 8GB of RAM and a 256GB SSD, you'd pay $1,299 for the laptop and $130 for the keyboard, for a total of about $1,430. The Yoga 2 Pro with comparable specs is currently going for $1,399, with an online price of $1,199.

And there's the rub: With a subpar keyboard, how can the Surface Pro truly be a laptop killer? And if the idea is for the Surface Pro to go head to head with Ultrabooks, the keyboard should also be included gratis. But it's especially bad if that $130 keyboard isn't even that comfortable to type on. So what do you end up with, then? A device that's slightly more expensive than comparable laptops, with an inferior typing experience. When you put it that way, it's tough to give this a glowing recommendation.

Wrap-up

With each generation of Surface devices, Microsoft gets closer to building a device that can replace both your tablet and laptop. Unfortunately, though, the company's progress has been gradual, and even after three attempts, it still hasn't addressed some serious usability flaws. This time around, the biggest problem is the keyboard. It's tough to say who should buy the Surface Pro 3 as a laptop alternative when the very thing that makes it a notebook replacement -- its optional keyboard -- offers a subpar typing experience and a frustrating trackpad. Adding insult to injury, it's not even included in the box; it's an optional $130 accessory that helps drive up the cost compared to similar PCs.

The good news is that despite its larger screen size, the Surface Pro is easier than ever to use as a tablet, thanks to a thinner, lighter design and more sensible aspect ratio. If Microsoft could just figure out the keyboard thing (and start throwing it in for free), I'd be more inclined to recommend this as a laptop replacement. For now, unless you want a tablet and laptop in equal measure, and sincerely enjoy using Windows Store apps, a touchscreen Ultrabook is still your best bet.

Edgar Alvarez and Zach Honig contributed to this review.