Installation was rather uneventful. iTunes gave me an error that it couldn't connect the iPhone immediately after the update, but when I unplugged it and plugged it back in, it mounted fine. Other impressions. -Backups are faster but still not fast -New preference to wipe the phone after ten failed attempts at the password lock is awesome -Installing apps and updates is definitely faster now -The "emergency call" bug has been fixed No opinion on the supposed increased battery life or fewer dropped calls. I'll have to use it more over the weekend to get a feel for that.