I've been using the latest weekly on a 6802 for the past couple of days. Right now, IMO, AOKP is the most polished of the Z Ultra ROMs. It doesn't have a microphone doesn't work on speaker phone bug, the non-GPS location lock bug, and the misc problems that the other ROMs seem to have. Battery drain hasn't been a problem for me, but then, I usually keep location detection off unless I need it. I seem to notice an increase in battery drain if I keep it on.
Past Android Devices: IFive X2, Nexus 4, Dell Streak, Samsung Galaxy Tab, Sony Xperia X10, Samsung i7500