It's very VERY much like Modern Warfare 2. As far as the multiplayer goes, it feels like a giant, juiced-up map pack. New weapons, but background sounds are the same as the older games, and it feels a like it's been recycled. All in all, it's a good game though. Basically Modern Warfare 2 refined and modernized. I think it's worth the $60, although I would have to say get Battlefield 3 first.
Feel the Wrath of Commander Galaxy!!!
-It's only natural to envy greatness-