I love this game!
Only two criticisms. One is the inability to remap the 'Home' key. My entire control system relies on this key and those around it. Consequently, I've had to try to get used to another set of keys, which keeps getting me killed.
My other gripe is a game bug. It usually happens after it's loaded up some new data. The framerate, which usually stays at a steady 60 due to me using the ifpsclamp=60 to stop microstuttering when strafing, drops down to 30. It still runs smoothly but the character's run speed is slow. I recall that Oblivion had a similar bug when riding horses. Suddenly, your horse would canter in slow motion. The solution with both games is to save and quit and restart the game, load your save and you're back to normal.
I'm hoping that they sort both problems out with a patch but the key mappings might be a standard for the Games for Windows boll###s.
Edit: I've just read that the slow-mo effect is caused by the ifpsclamp=60. So it seems I have to choose the lesser of two evils.