I remember first hearing this LP when it came out in 1969, at a music club at school. I'd heard of Frank Zappa and Captain Beefheart but never heard their music. I bought the record the following year when I started at university and it was a huge hit with all my friends - especially "Son of Mr Green Genes". This track really is a tour de force. Perhaps for jazz fans the variations and returns to a theme (was this orchestrated or improvised?) will be familiar - to a rock fan like myself there is nothing else quite as good (although the Doors "Light My Fire" runs it close). While it's probably a bit too slick for hard-line MoI fans (and I think I would probably agree with this criticism of "Peaches En Regalia"), I still listen to this music with the same exhilaration I felt when I first heard it. Buy it.