what a buggy piece of crap it is. Apps crash ALL the time now and the UI is awful. Why is it I deactivate notifications, they automatically get turned back on when an app updates itself? Why can't I go directly to the related notification/message from the lock screen? Don't even get me started on how annoyingly "broken" iTunes is now (Song information/screenshot is always 2 songs behind when it wakes from sleep, sometimes skips tracks even though the lock screen is on, etc.)....
At least you will get Apple's "Windows 7" for free very soon.