Just recently completed Darksiders on the 360, found it to be a really enjoyable game which reminded me a lot of "The Legacy of Kain: Soul Reaver" & "Legend of Zelda".  
 
Voice acting was pretty good with War being voiced by the guy that voices Gaara in the english dub of Naruto / Cpt. Ukitake in Bleach and Mark Hamil voicing his joker-esque companion "The Watcher".  
 
The world feels post apocalyptic (being mostly empty) and this can cause problems if you're trying to get all weapons leveled up for one of the achievements (although you do get more weapon XP when playing the hardest difficulty).