So did I. I read that it's the 1st xbox game to run at 60 fps which is double the speed of other games. Not sure if that's true but the graphics are spectacular. Once I finish Arkham City I'm going to play it again on Nighmare level. I'm pissed I missed a few hidden things but I'm thinking I didn't send the RC cars into enough areas.
I'm curious how fast I can beat it since I can skip all the side missions, mini-games and races this time through. There is a BASH tv level (Smash tv) that I'll still play to get a bunch of cash though. I'll never get tired of that level.