When i first started playing around with it on my 930 i actually thought it was quite smooth, as in navigating menues, typing etc.
But other than that it's horrible, ridiculous battery drain, even before this build i was getting no more than 15 hours light use (i barely you it when i'm at work) but now even doing nothing by lunchtime it's time to charge ! the phone also get's very hot, reminds me of when i first got it in august and had one of the preview builds on from then
Data keeps getting lost for some reason
I can't sign in in messaging, so no sms backup, when i press "sign in" nothing happens (i think this was like this on the previous build also)
don't know about the app or store problems
occasionally i can't unlock the phone, the screen doesn't turn on
Also it makes a different sound when i vibrates, actually sounds like a hardware problem but i didn't drop and has been doing it since the day i woke up after the update.
Other than that i noticed a few new things, in data settings you can now set to "3g only" (i noticed that from last build) and "3g & 4g" only