Just debranded an AT&T previously running an R7(something) firmware with R8BE001 (america_1) + a Laura custpack.

The only 2 negatives I have noticed are:

1) the volume slider during standby yields phone status now (known issue)
2) phone now seems to chew up the battery much faster

The "screen saver" is not active, and I have been running the same bluetooth acc the whole time.

I may back off to R6 as well, to see if this clears up.