This is what happens when a band that was created for a single comedy film decides to keep the joke going. This album suffers from two problems: 1) It doesn't have a hilarious cult film to support it and 2) It takes itself much more seriously than it should. There are some serious shredding solos on this album from the likes of Slash, Joe Satriani, Dweezil Zappa and Jeff Beck as well as a vocal performance by Cher(?!). One of the things that made This is Spinal Tap so funny is that they weren't very musically talented and had the lyrical sensibilities of a 13 year old metalhead. When you try those same jokes again with a much more technically proficient backing band, you lose a lot of the charm that made the first album work.
With all that said, I have to admit that "Majesty of Rock" always makes me happy for some reason, so this album is not entirely without merit. Just don't expect too much from this album and you just might find reasons to enjoy it.