Funny on its own, better if you're familiar with their works.

Rating: 9/10 (20 November 2006)

I won't go too far into this, just to say that I saw it during a sneak preview at University of Illinois at Springfield with a friend of mine a couple weeks back.
I've listened to the albums, and have heard a lot of the live material, so I figured this would be great.
It certainly delivered on the comedy part. As soon as Spumco's contribution was on screen, the laughing started, and it basically didn't stop throughout the film.
I'm not going to mention the better parts of it, as I wanted to keep this spoiler free. But, if you've heard and enjoyed their work, go. It's a great spin on their work. The inside jokes and direct references are great. If you haven't, it's still funny enough to enjoy on its own merits.
Oh, and by the way - stay through the credits.