I don't think it's a great game by any means...but I expected that going in, and I enjoyed it. I will say, it gets much better after you've gotten the crossbow. There's something very satisfying about sniping zombies with the crossbow, watching them drop, and then going to retrieve the bolt out of their skull. Like I said, not a great game...but that's probably the best part of it. It's unfortunate they don't give you the crossbow to start off the game. I don't know if it would have done anything to improve review scores...but people might have been willing to give the game more of a chance.
I'm still at the very beginning so I do have hopes it will get better. I am looking forward to the crossbow too. I do think it has some interesting concepts, especially with the distractions, bottle throwing, etc.