A promising game marred by careless development. Gamespot's review is right on the money for this PC game.
Controls are really buggy. Sometimes you throw a grenade a couple seconds later the character suddenly throws a grenade on their own. This can be very annoying since if you're in an enclosed space you can blow yourself up because of this control issue. I'm not sure this is a widespread issue but as I've been playing it, I just had to do without grenades (or molotovs).
Like the gamespot review said, the checkpoint system is very frustrating. The premise of getting weapons is to collect a certain amount of parts and then get it to Larry Tools. If somehow you get mobbed by a bunch of monsters or get killed by the grenade glitch (while you've just collected every ingredient) you're screwed.
The PC version doesn't have co-op online play, which just killed it for me.
If it weren't for the terrible buggy controls I'd give it a 7.