I give this movie two stars instead of one, because unlike many comedies that miss the mark, this is an amiable film that actually delivers a few laughs. Not too many of them, to be sure, but that's better than most comedies that don't work.
There are three major problems with this movie. First, the laugh density is way too low. Chuckling every 5 minutes doesn't cut it, particularly when you compare this comedy to the classic ______ (insert your favorite here). Second, the gags take way too long to set up, and then usually have paltry payoffs that are tiny in proportion to the laughs delivered. Third, there are too many characters. A slapstick slobs-vs-the-slobs movie like this needs a Bill Murray (Stripes) or other character to be the ringleader for good, and a Ted Knight (Caddyshack) as the ringleader for evil. There are great actors in this film, to be sure, with good comedic talent, but there are so many that the movie becomes unfocused in its comedy.
Indeed, the individual actors are quite good; I fault the script (which really needed a few more weeks of polishing) and lackluster direction and editing for making this movie much less than it could have been.