If you've seen the preview, don't bother with the movie.

Rating: 1/10 (17 October 2000)

My girlfriend and I saw Meet the Parents and both thought it was terrible. My sister saw it and walked out 10 minutes in, which is maybe a little extreme.
If you've seen the preview you've already seen every joke in the movie. So basically they've managed to cram 30 seconds worth of humor into a 90 minute movie.
Somehow even the jokes from the preview fell flat in the theater.