I love both of Glenn Gould's versions of Goldberg Variations, the first in 1955 (this one) made him famous, while the last one in 1981 was his swan song. The 1981 version definitely has the fuller modern sound and Gould goes deeper, yet 1955 is historic, the sound is still excellent, and Gould's technique is just amazing! However, this particular packaging includes more than Goldberg Variations. Two fugues from Well Tempered Clavier are added to the end. Good music definitely, but personally, I just want the Goldberg Variations with no additives. If you don't object to the extras, then by all means get this CD. But if you are like me, look for the older "Great Performances" version by CBS/Columbia. It has only Goldberg Variations, with no fugues.
If you are new to Glenn Gould, just remember that even now, twenty years after his death, his work remains controversial. Everyone agrees that he was a masterful pianist, one of the best ever, but many people just don't like his eccentric approach to Bach. They find the fast parts too fast, and slow is too slow. In the 1981 version, many object to Gould's tuneless humming in the background. Eccentric? You bet. But nobody else could even get away with it. "That nut is a genius," as Szell was once heard to quip.
Anyone who finds Gould too eccentric, or perverse, should try Angela Hewitt or Rosalyn Tureck. I love their versions of Goldberg Variations too! Rosalyn Tureck spent her entire career of about 60 years studying Bach, and recorded Goldberg Variations at least three times. All are excellent. Angela Hewitt is just masterful, and plays with sheer devotion.