Short and semi-sweet...
Yet....
This game is anything but open-ended. There are maybe 2-3 tracks you can follow through each individual level, but you absolutely must go through it until the end. It's as if they're forcing you, there are no cool side-missions, anything of the sort. You can jack some cool vehicles and drive around blasting the crap out of everything, but the novelty of that wears off quickly.
And it's not like you get your money's worth here, either. The levels are quite short, and the average gamer could probably make it through the whole thing in 5-6 hours, maybe less. Much too short for my taste.
The gameplay is quite disappointing. All you basically do is run through the level, eating the brains of whoever you see and converting them into your zombie minions. They then follow you around, in turn, mopping up the remains...it's quite cool to look at, and very entertaining for a while, but then you see it's just the same old thing all over again. Stubbs has no cool weapons. You can gain access to them by "possessing" people with your zombified detached hand, but this too gets old quickly, there's just not enough gameplay variation.
Graphics? Eh, standard stuff, but they do have some really sweet lighting effects interspersed throughout...
The one area I thought the game really shined was the soundtrack. There's some pretty awesome 50s pop music in here, and the scene where Stubbs is having a dance-off with the Police Chief really demonstrates this well. The music was always great to listen to.
Apparently there is a 2 player co-op mode on the XboX version, which I don't have any experience with, but I suspect it's much the same thing. You'd probably get some more chuckles playing with your buddy, but there likely wouldn't be a reason to beat it more than once.
This game really has no replay value, you'll get bored after you get through it once. It's not a bad game, but definitely not what it was hyped up to be either. If you're itching to play it, might be a good idea to just rent this one.