shouldn't this be credited as "unofficial"?

A really happy and joyous vibe permeates this two gig set (Toronto Feb. & Appleton May 1969). Zappa is yet to enter the ultra-sneery, cynical, sarcastic and sleazy phase of his career and all seems sweetness and light. There's a lot of nice '50s songs done pretty straight. When Frank introduces them he tells you the year of original release and even the record label they came out on. His song introductions are funny and warm. After a few '50s songs to get in the mood he switches to playing a deeper, more complex set including A Pound For a Brown and an amazing Charles Ives (Beefheart fans will recognise 'The Blimp' here). After that you get some more beautiful '50s numbers and so it goes along.At all times the band are more than capable of rising to any musical challenges Frank can throw at them. It's not the original Mothers - there's no Ray Collins or Elliot Ingber... but with players like Art Tripp, Lowell George, Don Preston and Ian Underwood on board you know things are going to be tight.The package is nice with great design. Four coloured discs, pressed well with mostly the whole thing on three CDs too. Occasional hiss on the early tracks and on the announcements but other wise it's a good listen (apparently soundboard recordings on reel-to-reel). I'd give it 8/10 on the bootleg scale. It's great to hear the '50s tracks but it's the more complex and weighty tracks that I come back too.

Good review, this box set encompasses what I believe to be two of Zappa's best concerts, at least with the original mothers 60's mothers lineup. I wish I could afford it though, haha :P