Personally, I think it's pretty overrated. It's a game with a sensational art style, a decent level editor, and bad to decent platformating.
The user created levels are supposed to be the big draw but I didn't see much. It has been a few years since I played, but most levels were either trophy whore levels, bad music levels, and ripoffs of other games/movies that were bad too. Mixed in there you could occasionally find a decent level, but those were few and far between. People kept telling me that community ratings would fix all that but when people rate all those above levels as a 5 so others will rate them a 5, that kind of defeats the purpose.
If you're bored and you can find it for cheap, it wouldn't hurt to buy it, just don't expect the amazing game that people make it out to be. It's nothing more than a barely acceptable platformer with a good art style.
