Well..I have always preferred "Fireball" and in "In Rock", not to mention even older, semi-progressive recordings by DP.  "Machine Head" was too 'primitive' and deprived of melody at that time (IMO). This CD now fills the gap perfectly. Each cover sounds different and is perfect (with exception of 'Smoke On The Water' by Flaming Lips). However we have a treat here, special gem: 'When a Blind Man Cries'. It is like a 'Child in Time' on "In Rock".