I think that the positive reviews of this album have more to do with the happy memories it brings some of the reviewers than its actual musical content.  Listened to today, the humor is heavy-handed and unfunny, the skits are annoying, and Flo and Eddie are unbearably irritating, whether they're singing or attempting to make jokes with a very snide and unpleasant Zappa.  A self-satisfied, smug feeling of "Aren't we so clever, making fun of pop music!" permeates this disc.  It's mean-spirited, snide and unfunny.  I like a lot of Frank's work, and when he was at his best he could be very funny.  This isn't his best work.  Most unforgivably, the Mothers sound very tame and rote, with valuable playing time surrendered to the tiresome Flo and Eddie, whose appeal eternally escapes me.  I gave this a chance long ago and it hasn't grown on me since.  Give this a pass and get one of Frank's classics instead, like "Hot Rats" or "Apostrophe."