Main issues:
1. In the music player:
- all songs crackle and skip for a few seconds at the beginning.
- album art takes 10+ seconds to show up for each song
- Not a bug, but now a feature apparantly - you can no longer choose how to sort custom smart playlists. Pre OS5 if i had a smart playlist to say show songs from x month to now and sorted them by date added in iTunes then when i synced the playlist showed in that order on the iPhone. Now they show in some random order which is extremely annoying.
2. Phone reboots during phone calls probably 40% of the time.
3. Battery life is crippled. I have Location Services off (including all the ones in System Settings), iCloud off, Notifications off yet if i leave my phone 100% charged and go to bed with no apps running when i wake up the battery is close to dead or so dead the phone is off. During the day the phone lasts about 3 hour before its dead, whether i've used it or not.
The Apple store "Geniuses" suggestion was to restore it (the old have you tried turning it on and off again chesnut), which i've done 3 or 4 times to no avail.
The phone was PERFECT on OS4, i had 0 issues. Put OS5 on and ruined..And the worst thing is Apple wont event let you go back to 4 so i'm stuck with a crippled phone.