its a pretty good game. it continues mw2 pretty good. like in mw2 where soap gets stabbed and Nikolai comes and he says i know a place. well on like the 4th missions you are in france and soap is on a operating table.
Personally I think Mw3 is a good game and you should buy it. The Multiplayer is so well balanced that it seems as though there are no over powered weapons and the game actually depends on you having skill.