"The fêting of the Mitchell oeuvre continues apace with this boxset of the four albums that marked the singer's post-'Blue' ship-jump from Reprise to Asylum Records in 1972 ... This period encompassed both Mitchell's greatest commercial success and a shift in musical style, away from her early folk sound to explore jazz, pop and self-production. To listen to these albums afresh, and as a quartet, is to hear the great flourishing of a musical mind".