I won’t hide the fact that I’m a Canon fanboy. Canon just gets a lot of things right. Many of them are, in my books, the most important things, like great color science (images look beautiful and skin tones are rendered organically), the aforementioned stellar auto-focus (after all, what use is an out of focus photo or video?), and long battery life so you can shoot for hours without worry.
Also, you can't leave it powered for too long at a time. I have noticed that if I record small clips for 1.5+ hours then the number of frames that drop increase dramitically, and I have to unplug it to let it cool down. If you want to record voice, it only records voice that comes through the speakers of your television (meaning, if you're recording voice on xbox, go to preferences and set voice to "speaker only" or "Both Headset & Speaker"); however, sound effects of blasts and explosions of games come through very well. The quality of voice recording is pretty bad, but I didn't buy this for voice recording, I bought it for video.