Or of curiosity why do you think most people, critics and regular viewers who saw it pan the movie as one of if not the worst of the year?
It's got a really awful ending. You've probably read about it online. It's also not necessarily a good movie - it's a fun one. It's got some cheap jokes, some clever ones, but you get the feeling every actor except Monaghan and Sandler are having a lot of fun with it, and the effects are cool. Monaghan and Sandler are bad though, and thus, with two poor leads and an awful ending, I understand the negative reviews.
On another film site I'm on, everyone who has seen it agrees that they were positively surprised by it, and the friend I saw it with liked it too. We went into it expecting to riff on it, but after 20 minutes, we were just enjoying it for goofy fun.