Absolutely hooked on this game. One of the best in my collection.
The gameplay is excellent, the soundtrack is amazing, the multiplayer adds more than plenty replay value, and the game is a quite solid production with lots of potential for enhancement later on.
The only drawbacks I have with this game are the survival capping after the hour mark (eventually the mobs just start cheating and there's no way to survive after a certain point just after about an hour into the match but this isn't too bad of a thing, keeping games shorter than an hour and a half especially since in multiplayer there is no pause feature yet) and endgame, the brightness of the lighting can white-out the action.. also the grid is crucial for the game mechanics yet most of the time it is incredibly difficult to see.. instead of using bright green and red circles on a disappearing faint grid.. they could have made the grid a bit more visible.
Overall though, excellent game, I very much enjoy it and recommend it.