The game is good for what it is.
Single Player isn't that great, the AI is absolutely terrible, they are dumber than a box of rocks. You can be standing one place, move to another and they won't follow you and try to shoot you, they just stand stationary.
Multiplayer is alright, not impressed with the amount of lag, and the maps aren't exactly user friendly. If your someone who is looking for a quick fix shooter, and you aren't really into playing a ton, then this game is for you. It's easy to pick up and start playing right away. Major plus to this game is the amount of people in a single server.