This game will probably be great for the Zombie Games Fanatic.
It's sure got some interesting combat system. Some interesting Character to play as (Dead santa, Members of slipknot and even Bloodrayne). And alot of great soundtracks. Heck even the stupid jokes is funny. And the combo system is pretty good.
But other then that, all you do is killing zombies and kill more zombies and more and more zombies. And the single player campaign can be completed in just 3 hours with a decent amount of score. When you're done you probably still be playing it to unlock the characters and getting all gold on the missions but that's all you'll be doing because the equipments are rather very cheap and easy to get.
The multiplayer is sure interesting but i rarely ever seen anyone play it. So it's probably no use.
Overall i think it's just an average games.
You should probably rent it instead of buying it.