You have played this type of game many times now, the best incarnation of it in my opinion is still zombie rampage, but this game adds quite a few weapons into the mix. Also the zombie death animation isn't terrible. Although the default Poser character render in the beginning is overused.
It's an ok game. One thing that bothered me was that they said the desert eagle didn't pack as much of a punch as much as other high caliber pistols.