while there's people out there badmouthing this movie, i thought it was alright. plot/story wise it was kind of a mess, and it gets really mean-spirited towards Ben Stiller's character a bit too much for my tastes, but it had enough laughs and i liked the characters enough that i could forgive it. really, i'd tell people to avoid this unless they like really dumb comedies with fart jokes and slapstick, and if you're a fan of the previous two movies.
wish i went to the other theater and paid only half of what i did, though. :/