I like it better than COD4.
Graphics: The graphics are fantastic. Better looking and far more variety than the boring and bland COD4 maps.
Sound: Sound is fine, some people are anal about it, but I don't think it is as bad as they make it out to be.
Many people have problems with the game crashing or bugging out on them, so far I only had a problem once in a while with certain servers kicking me out, maybe it was PB, not sure what caused it. 90% of the time there is no problem.
While it isn't perfect, it is fun and a nice variation from COD4.