Full disclosure, I'm an iPhone user, but not here just to hate on Android.

How did you access the camera from the lock screen before? On iOS, you swipe up from the bottom right corner. This seems like the same thing, only swipe diagonally. Just curious as to how it's better than before.

I don't like the tap to wake. Seems like there would be way too many accidental wake-ups. That'd drive me nuts.

I don't quite get the end-of-scroll animation. A little gray thingy pops out. Just doesn't seem like it's fitting to the motion.

I really dig the Rolodex style multitask view.