I nearly bought a 360 just for this game!
Even if I only played the game twice (since I don't have a 360 but I'm really looking forward for the PS3 release) it became an instant classic. If your looking for a great game with good music (you can download the soundtrack on official Behemoth forum), replay value (leveling up your character, unlocking character, finding weapon, etc), humor, nasty well balanced boss fight and multiplayer mode (online and offline) ... well don't look any further you have it.