Decent game with some pretty fun mechanics. The various ways to kill all humans is pretty fun but the storyline kind of drags on. The cut-scenes (while well-acted) go on too long and leave you just wanting to go back to killing. Toward the end of the game, I found myself skipping dialogue.
I would have probably been done weeks ago if my OCD didn't make me have to destroy every single pixel on the screen. Still it's a nice game to take your frustration out on, by beating the crap out of inanimate objects... and some animate ones.