I am not having any problems with this build so far (knocks on wood)
Using the diagnostic tool to track battery performance (we'll see how that goes
) Options>Device>Advanced System Settings>BlackBerry Device Analyzer (if anyone is interested), after that it gives you a few options like Mail Issues, Device Responsiveness, Cellular Connections, and Hardware. I started tracking from 00:00 Monday, I'll let it run for a week or so.