The movie is fucking hysterical (a million times funnier than CLERKS 2, which amounted to not-funny-at-all but for Jay and Silent Bob), and if you disagree then you have never experienced Explosivo ... and I pity you.
I'll say this about the D film, though: the first ten minutes look like TOMMY, and the rest pans out as pretty standard "comedy film" formatting. The movie would have been a hundred times stronger if they'd kept up that kinetic energy of the intro scene, but as it stands it's worth it just for the Sasquatch sequence, which had me crying and a made little pee dribble out.
And I don't even generally laugh at potty humor, even though The D film starts and ends on a fuckin' fart joke.
So when it comes to video, don't rent it, buy it -- and if you can still catch it in the theater, go do so.
Stand up for The D.