I haven't laughed this hard in a long time.  After watching the preview several times in iTunes.  I wanted to see this movie but was concerned that it would follow the pattern of most comedies where you've already seen all the funny parts before you see the movie.  I trend that ruins the experience.  And while the trailer's parts were lessened slightly because of frequent viewing there is a huge gutbuster waiting for you.  I even backed up the movie to watch the scene again to laugh again.  Spot on performances by the entire cast.  Directed by Frank Oz.