The end credits are funny - the movie isn't.

Rating: 5/10 (20 September 2009)

Did you think the scenes in the trailer were funny? Well, they're actually not very funny at all; it's all slick editing. And yes, as expected, these are the only highlights (if they can be called) of the movie. IMDb's top 250? You've got to be kidding me! Remember that old Tom Hanks movie from 1984 called Bachelor Party? Well, the writers tried to put a new spin on the concept of a crazy bachelor party as movie material but with one big difference: they left out the bachelor party! Now, this fact is not concealed in the trailers. It is made very clear that this movie is about a group of buddies trying to piece together what exactly happened the previous night during their wild bachelor party from which they can't recall anything. However, the writers didn't really make that into a particularly funny story.
So, here's my spoiler: during the credits, you see photos that were taken during the bachelor party. This is just about the only funny part of the movie. And it makes glaringly clear how the movie would have been so much fun if they had simply made it about the bachelor party. Spoiler over.
My advice is to wait until it's out on comedy central. There really isn't much inappropriate material to get cut out for network television anyways.