In terms of the music it includes, this set is a great bargain. CD1 contains the Goldberg Variations, as on Bach: Goldberg Variations, BWV 988 (The Historic 1955 Debut Recording). This is Gould's original 1955 recording of the Goldberg Variations, not the second 1981 recording. CD2 contains the Two-Part Inventions and Three-Part Sinfonias, as on Bach: The Two and Three Part Inventions (Glen Gould Anniversary Edition). CD3 contains the seven Toccatas BWV 910-916, as on Bach: 7 Toccatas BWV 910-916. CD4 and CD5 contain the six Partitas plus a collection of Preludes, Fugues and Fughettas, identical to Glenn Gould Edition - Bach: Partitas, Preludes & Fugues. CD6 is a duplicate of Art of the Fugue - 70th Anniversary Edition with Glenn Gould playing part of the `Art of the Fugue' on organ, and part on piano, but without the very informative liner notes by Michael Stegemann which accompany the single-CD issue.
Adding up what is included, this 6-CD collection is priced at about one-third of the cost of the smaller sets included.
To read reviews of the music, the reader can refer to reviews of the sets listed above.
But be warned: this 6-CD set includes no liner notes whatsoever. The six CD's come in a cardboard box, with each CD in a plastic sleeve (no jewel boxes) - it's very portable. The only information about these recordings is on each of the plastic CD sleeves, listing the tracks and giving the date and location of each recording. There is no discussion of the music. Thus for example, CD1 contains 32 tracks of the Goldberg Variations, recorded June 10, 14-16, 1955 at Columbia 30th Street Studio in New York City, plus two more tracks with two Fugues recorded July 29-31, August 1, 1957.
The absence of any liner notes for this collection is surely a cost-cutting move, to save printing costs. But especially given Glenn Gould's propensity to express himself in words (listen to the interview disc in Glenn Gould: A State of Wonder: The Complete Goldberg Variations (1955 & 1981) : A State Of Wonder, or read the Glenn Gould Reader) including writing his own liner notes, this leaves a gap which is regrettable. Suggestion to Sony: please provide DOWNLOADABLE liner notes (no printing cost!), to be downloaded via the Internet!
(DGG has done this for the album Bach, J.S.: Cantatas & Sacred Masterpieces, where the texts of the Cantatas can be downloaded on the Internet).