Everything i've seen on it breaks down like this:
1/3 of the game is awesome. Enviroment, enemies, everything is truly awesome.
2/3 of the game you begin to see the envirment scaled down, and things begin to really become repetitious.
3/3 of the game seems like they just rushed it. Enviroments are now small corridors with enemies, you're seeing level-specific enemies thrown on to levels that make no sense, and you've discovered the main plot of the game is satan wanting to get his hands on Dante's bitch's tits.
It got a 6.5 for a reason.
Darksiders got an 8.0
Do the math, and get Darksiders.