I beat the game a few days ago and been spending sometime leveling up in the multiplayer. I am also going through the single player to get some trophies with the tweaks and guns that I bought. I really wanted to experience the game fully before I made my call on the game, but...
Seriously. Top five of the generation.
Amazing. You should play it.
Don't have a PS3?
Get a PS3 to play it.