I have 10166 running on my 1520, 640, and Icon, all were of course hard reset. They all 3 have this in common:
1) Can't adjust the glance screen settings, the glance screen app tried to update and install but failed. My glance screen settings came over from my backup and it works, but the settings don't appear in the control panel.
2) Can't hear any text notifications, can't even figure out HTF to even change the tone for the texts. VERY annoying!
3) The Outlook mail app is still a POS. Crashes all the time and only even syncs with Gmail the very first time I set it up. I have to keep deleting the account and re-adding it! I'll have to download a 3rd party Gmail app just because of this problem. This renders my calendar useless though
I also had a lock screen issue on my 1520 after Pandora. If I pause Pandora then try to log in, I enter my digits and nothing. If I log in BEFORE pausing Pandora, it works. This was via streaming BT.
The Office preview apps won't install on my 640, keeps saying errors on their end. Yeah that's bloody helpful.
Allot of the Verizon apps on the Icon fail, probably a good thing lol. myAT&T app crashes when I try to run it, who cares.
TruCaller doesn't work.
Aside from that, seems barely OK. Lags like a mofo on all 3 phones and I feel like I'm walking on eggshells so something doesn't crash lol.
Basically the fun of BETA testing