The more time passes on, the more as a musician I really come to appreciate how immensely gifted and talented a songwriter musician Frank Zappa was.  Without pontificating or elaborating on each piece of music on this album, which has been done previously, I will say that very few musicians and composers in rock have approached Zappa's technical and artistic skill in writing music for arguably a limited medium.  Like someone else said, if you like unusual music, with a few melodious pieces thrown in, you will find this album a rock epiphany.  The cover alone warrants a hall of fame vote.