It constantly locks up. First noticed it playing Undisputed, when I start a new career it gets hung up on trying to select opponents everytime. Thought it was a loading problem so I tried installing the game on the hard drive but then it said it couldn't read the disk. (the disk is in perfect condition). Then I tried to play NBA 2k12 which lives on the hard drive and that completely freezes. It started getting hung up on Netflix. Just went to hell.
Did everything I could think of. Different games, cleared cache, reformatted, tried an entirely new drive... I think it's toast.