It wasn't that funny. It would have been better as a series of skits on a comedy show. I think I would have enjoyed it more had I been a twelve year old boy, and maybe not even then. It had some good moments, but too much of it of it was overly contrived. Some parts were downright disgusting.
However, I really enjoyed getting together with my sister and her kids, and eating our 'bottomless' bag of popcorn, as well as all the chocolate my sister had smuggled in in her giant purse! That was my dinner, since I rushed to the movie from work.
My advice is to wait for this movie to come to DVD. And then wait some more.