Watched this one a couple nights ago.
Really enjoyed it. It was a nice change of pace from all the 2 and a half hour blockbusters. I also like that Rifftrax presents seems to be focusing on slightly older films. Kevin and Bill were in fine form for this extremely riffable movie. I laughed throughout this extremely strange film. I had seen it when it first came out but after watching the rifftrax version my opinion of the movie went down several notches. Highlights for me were all the comments on how grimy-looking every set in the film looks (it reminded me off one of my favorite riffs in MST from the Undead...'Dirty flithy walls, a short lived design fad) and the scene with the head-gear woman. The riffing in that scene was great.
Lots of good riffs and lots of good fun. Would like to see them tackle more grim, depressing, joyless, stupid, grimy stuff like this.