I bought it on saturday and refunded within the 2hrs. Thought I felt some microstutter but that disappeared when I turned vsync off, but then suddenly towards the end of the mission it grinded and froze to a complete stop. Was waiting for the CTD, but then it got going again. Restarted, and it happened again after 10 mins.Game looks and sounds great to me.
Only thing I'm worried about is the stuttering some people have reported - is this an issue for many people?
Was really enjoying it as well :/