I miss the auto-brightness on iOS. I was able to set my own brightness on auto, this way a person can set the brightness to their liking while still having auto-brightness on. The current setting on the GN2 is a little low for me, especially in a florescent lit room.
I've tried out third party apps like Lux but it was a bit quirky and I don't really like the idea of having an app control system functions.
It's no big deal though just a minor annoyance.