It can be very fun when you're playing with the right people. This can be said for most multiplayer games, though. Outside of that, it's a solid game. I don't think there's too much that's outstanding here. Most things that this game excel at were in the first iteration, like the tactile and involved feel of the weapons/items, the difficulty, the humor of the accidental team kills, the button prompts, and the somewhat fast-paced mission structure.

I'm glad the game exploded with success; hopefully it's a lesson to other developers/publishers that something fairly simple can be appreciated by many. Not every game needs to be a grindfest that encourages you to continue spending time and money on a constant basis just to keep the game "fun".