I have to go with the best ever!
I have never laughed at a Rifftrax so hard before that my wife had to run out of her work room to see if I was having some sort of seizure.
First you have a movie that is made by an eccentric genius so wrapped up in his own Californian reality that he assumes what he has made is immediately understandable, accessible and important to a mass audience. That and if you continue to say your film is a masterpiece against all the evidence to the contrary, everyone will come around and believe you, eventually. Keep on dreaming Tommy, weirder things have happened!
Next we have a Rifftrax that is a superb effort because it's obvious to me that Mike, Kevin and Bill really enjoyed themselves producing this Trax. They "Shined their Love" on this one.
I will further stick my neck out and say I liked the Disembodio bits as well. I know a lot of people don't like it when Dis gets out of his job to just sinc up the Trax, but I like it when he comes in with his own material. It's fun. I have locked my car doors riding down the Interstate and made my friends suffer through his "Night Train to Mundo Fine" and I sing along! What do you want? I'm eeeeevil!!