The connection between the Apple Watch and an iPhone is the core of Apple's wearable experience, and for the first time, the company gave the Watch the tools to function independently. Seeing the Watch hop onto an LTE network and use your same phone number is undeniably neat, but honestly, it's not something I'd want to do very often.

First off, yes, you're going to have to pay your carrier $10 a month for the privilege, not to mention an activation fee once this first wave of promotions dies down. Setting up the Watch with my AT&T phone plan was mostly a breeze, but some reviewers have experienced issues getting everything squared away, especially when older rate plans were involved. Your mileage may vary, but I suspect most of you won't need to worry much.

Actually using the phone is easier than expected -- you can either punch in a number or select one of your contacts -- and call quality was generally very good. In a majority of conversations I had, the people on the other end couldn't even tell I was talking into a watch. That can change suddenly, though. Earlier this week, I parked myself outside the office to take a few phone calls, and the signal indicator bounced between two and four dots of coverage while I was just sitting there.

As a result, call quality got really strange -- I could hear the other party just fine, but I sounded like a mess to them. This happened only one other time, in a completely different location, and I'm at a loss as to why. In any case, if you're interested in taking calls on a Series 3, a Bluetooth headset is a must. It'll also help in situations where the Watch's speaker just isn't loud enough, which is most of the time, frankly.

Messages rolled in quickly too, but here's the thing: Not all messages are treated equally. As long as you have some kind of wireless signal, iMessages will be delivered just fine. Text messages are usually subject to a delay, since they're routed through your iPhone, but this also means that SMSes won't come through at all if your iPhone is dead. Emails running through Apple's Mail app worked fine but took longer than usual to pop up on my wrist, so I wouldn't advise going watch-only when urgent business is in the offing. And most of the Watch apps I installed worked normally, though a few -- like Slack and Twitter -- either did nothing or force-quit when I tried to use them.

Early review models also seemed prone to connectivity issues stemming from a Wi-Fi bug -- in a bid to conserve battery life, the Series 3 tries to latch onto wireless networks your other Apple devices have flagged as being suitable for use. The problem was, not every network was flagged correctly, so captive portals (like those used at, say, Starbucks) would get the OK and the Watch would try to connect, with no way of getting past whatever interstitial screen popped up. It's not that the Watch was going out of its way to jump onto unfamiliar networks -- it's that some of the networks it thinks are kosher actually aren't.

This is a major goof, but I can see why it might have escaped detection -- I have had precisely zero issues with my Series 3 attempting to latch onto bum networks. Then again, I'm one person, and I find it hard to believe that not a single engineer testing the Series 3 prior to launch ran into this. I'm fairly sure you won't run into this very specific kind of trouble, but it remains a risk; Apple promised a fix after catching some well-deserved flak, but it still hadn't materialized when we published this review.

Really, my biggest concern is much more mundane: Going completely iPhone-free means the Watch's battery life will take a huge hit. After an early-morning run while listening to music and using the GPS, followed by a couple of test calls, the Series 3 was on its last legs by early afternoon. Apple has always been clear that the Series 3 is more of a temporary phone substitute than an actual replacement, so this probably won't seem shocking to you. Still, if this morning routine sounds like your idea of a good time, remember to have a charger handy.

I don't mean to make the Series 3 sound terrible at this stuff -- when everything works properly, it makes for an adequate untethered companion. It's just too bad that those moments weren't as common as I expected.

As a fitness tracker