In summation, I laughed most of the way through the movie, I haven't done that in a long time, even watching comedy films. So, even if you think the movie is the dumbest concept ever, much like I did, the film is actually worth viewing in the second run theaters for at least the laugh value. If you really, really, don't want to watch it, at least rent it and watch it when it comes out on DVD.
Oh, some trivia, "This film's title originated at an after-work happy hour among Hollywood colleagues to see who could come up with the most awful pitch for a movie. Producer David Berenson, who worked for DreamWorks at the time, gave his pitch for this movie based on a script called "Venom."" source: IMDB
Anyone that knows me would know, I am very critical of movies, and it's extremely rare that a movie would get a response like this from me.