I flashed RR to test it yesterday, and it seems really nice UX+UI wise. A lot of customizable options to allow you to play around with the settings. However, I noticed that there's something wrong with the battery drain - my phone dropped from 70%...
Seems that the battery itself was the issue after all. After putting in the new battery, everything seems to be back to normal.
I may have had the same problem. Try posting the error anyway.
My installation failed because an assert failed, deleting these lines:
assert(getprop("ro.product.device") == "ST27i" || getprop("ro.build.product") == "ST27i" ||