Very fun, but the single player is too short. There is no replay value in the single player.
This game is true to the series in that it was very fun with a decent plot and good gameplay. This game however, disappointed me in that it seemed noticeably shorter than the other titles in the series. This is amplified by the lack of Quick Mission style play. On top of both those, there is a very sparse collection of guns in the game, including only one sniper rifle and one saw. The only saving grace in the weapons selection is that variations such as grenade launcher or silencer can be attached. It is also worth noting that the entire weapons selection (except the bazooka) is available from the first mission. This may appeal to some players, however I feel that this takes away the satisfaction of realizing that you have earned the right to a new weapon.
In conclusion, this is a good game that I would recommend playing, though perhaps not purchasing except for the multiplayer. It is a shame that there is essentially no replay value and poor armory.