like matt74 said it not to be comparaid to CoD4, the reasons are simple, it a total differnent game and it aims a different audience, CoD4 is made for poeple who play serious and likes to hide. and that works really well like battlefield it made for the poeple who loves explosions and no camping just pure manic. and the graphics are up to PS3 standard, like when you shoot a tree half way it cracks where you shoot it, also the sound effect are amazing, when you in the house the sound of your gun or rockets it echos like it would do and you alway suffer from the explosions defness. there was two things that let me down on this, you cant really shot though walls but instead you can blow then up so that make one problem then and that is the online, only one game mode which is fun and it works but i suffer from lag a lot and i normally have crisp connection, maybe they sort this out near future.
its a must buy