The idea behind Acid Space is a good one. Psychedelia, prog and space-rock from the late '60s and early '70s deserves an extensive box set spotlighting such pioneers as the Yardbirds, Gong, Hawkwind, Tangerine Dream, Amon Duul II, Holger Czukay, Curved Air, Daevid Allen, the Nice, Magma and the 13th Floor Elevators. Cleopatra's four-disc attempt doesn't count as the definitive overview, however, since too many of the cuts are either live cuts, outtakes or flat-out strange choices. There's enough of interest here to make it a worthwhile purchase if it can be found for a reasonable price, but it should not be thought of as the final word on the genre.
AllMusic Review by Stephen Thomas Erlewine