I flashed Bamf 2.1 Remix with MR2 over the weekend but went back to 1.7 after a little more than 24 hours.
The Rosie buttons were incorrect (apps brought up phone, phone brought up apps), dial pad did not disappear during a call, never locked on 4G in my house, GPS couldn't find my correct location, FC on Handcent, Lookout.
Prior to flashing I wiped user data, cache and dalvik 3x. When I reflashed (twice) I wiped each of them 3x again. Each time I flashed I waited about 10 minutes after rebooting to use the phone so the ROM would settle. It never worked well for me.
I don't have a lot of time to tinker with my phone so I flash stable ROMs. The GB taste was nice and can't wait to have it but there were too many problems with my phone on 2.1 Remix.