Having listened to this recording since it first came out, and being a ginormous Zappa fan in any case, I can assure you sans doute that this is one of the best Zappa CD's you will find. "Son of Orange County/More Trouble Everyday" alone is worth the price of purchase.  In general, the period between 1972 and 1982 is his best work, in my opinion.  Try "Bongo Fury" too.  For what is an entree of Zappa without a surfeit second dish of Captain Beefheart?  Just try not to "freak out," OK?