EA might have put in a lot of work in to NFS Carbon, but it really doesn't show. The single player campaign was very short. The story was really shallow. and overall the game wasnt very immersive.
Another thing that is odd is that EA put in quite a few sweet muscle cars into the game, but took out the drag races. Whats the use of muscle cars if there are no drag races?
On the positive there is much larger online experience in the game, but if not for that the game aint so great.