I was sceptical beforehand but I gotta say, the Xbox version works great for me. I've encountered one complete freeze and two or three instances where I got stuck on objects and had to reload a save in over 30 hours. Surprisingly few framedrops so far. There are some other issues but there always will be in a game this size. My biggest pet peeve is that the animation freezes for like half a second when you break off a bobby pin in a lock (yes, I've stolen together all my shit). Gonna need a patch for that because it seriously triggers my OCD.
I'm hearing the PC version is what makes them tear their hair out at the moment. The framerate frequently drops way below what's required to run smoothly pretty much no matter what you do there.