FWIW:
RC1 killed my battery within 2 hours. I was playing music for my son and noticed it stopped. Woke the the phone and it said "No Service" and then it shut down by itself. I'm guessing it said "No service" because it was shutting down; I don't have service problems at home.
I've uninstalled it, as I need my phone to be working early tomorrow morning. I will install it again tomorrow (from the Market) and see if I get the same result.
Settings-wise here's what I changed from default:
- Manage data was off (because of the aforementioned Bluetooth issue).
- Wifi retry time was 5 minutes. Usually when I have wifi issues, it really only requires a toggle so 30 mins is excessive for me.