First, the basics. The most important thing you need to know about Pix is that it's been tuned to make your pictures of people look better.

"There are things the Apple camera does that we don't do and might not ever do," said Josh Weisberg, general manager of computational photography at Microsoft. "The goal was around people photos -- can we make better people photos than the stock camera? And we succeeded."

From the moment you start Pix, it's capturing what your camera is pointed at -– you can never tell when something's about to happen, after all. Once you press the shutter button, Pix snaps 10 frames, and Weisberg says that's where the magic really kicks in. Algorithms evaluate those 10 frames for obvious things like sharpness or exposure, but also underlying characteristics like whether a person in the shot seems happy or sad. When that near-instantaneous process is done, you'll be given up to three "Best Images." The image data from the leftover photos is used to enhance those winners before being deleted. All of this happens on the fly and without any extra fiddling, so you don't need to be a photo buff to snap some great shots.

If the app detects a bunch of similar pictures, it'll stitch them into a Live Image, but only when it thinks what's going on in the photos is interesting. Oh, and the Hyperlapse feature that Microsoft has been working on for years is here too. This time, though, you can turn existing photos into time-lapses, or just use it to stabilize video you just shot.

Using Pix is very much a learning process, and I don't just mean for you, the user. According to Weisberg, the app sends anonymized bits of "telemetry" -- settings data and what Best Images people fave'd or deleted -- back to the mothership, where human judges will examine them and adjust the image processing algorithms accordingly. Basically, the more you use Pix, the more insight it gains into what makes a photo good. All told, Weisberg was right: The app really is helpful for improving your photos of people. Usually, anyway.

In no time at all, I was snapping photos using Pix that came out punchier and with a greater emphasis on the people in the shot. When the testing period inevitably overlapped with postwork drinks at a local dive, Pix shined even brighter. I mean that literally, too: Smartphone camera sensors often flounder in dim, dank conditions, leaving software to do the heavy lifting required to make a passable photo. Microsoft's photo processing was both superfast and mostly great at brightening up pictures of my colleagues and removing grain without making things look unnatural. I was utterly impressed ... until I wasn't.