No mik version has bugs and it cant be used for daily purpose until those bugs are resolved. Try the andy's GB also available @xda. That one is working fine with smooth and speed.
No bugs at all except fm radio doesn't work (I never listen to FM) and you need third party apps for usb/wifi tether. I am using it from 1st day and now after rc1, its awesome and even angry birds doesn't lag in 50-60 levels (complex levels) which was a prob with froyo (void, megatron, nessy, lol v1.4, any rom you name it, I hv tried all)
and battery life ?... Cos I always leave data connection (EDGE) and wifi active on my phone always ... I found massive battery drain with milk_os GB beta 3 ... so if I can squeeze out 1.5 days on it like I could with Void, I will be happy to flash back to GB....