Going by the user reviews on metacritic, there's a massive gap between those who bought something that looked fun and those who insist on a fairly closed-minded metric for rating all games. The latter seem to think games like this are killing gaming which is entertaining but impossible to take seriously. If anything, those who take metacritic as the definitive measure of quality should perhaps reevaluate how they think about game quality.
Is this game more fun in a group than Wii Music? I played that with friends and it wasn't fun for any of us. This looks like it would be fun to play with some girls and wine.
Demon's Souls Official Thread | Currently playing: Left 4 Dead 2, LittleBigPlanet 2, Magicka