Typing was a problem for me (at least initially) and can still be a problem whilst inebriated however I'm getting better (not sure if that's a good thing though )
Anyways, one cool feature I like is:
When the phone is locked and you're using the iPod app to play music, instead of having to swipe, unlock, select iPod, etc. you can just double tap the home button and it'll bring up a small menu allowing you to pause, change volume, go forward or go back. Pretty handy if you ask me!!!