This was the second of two double albums that featured one disc of live tracks and one disc of studio track. It might be said that there are four Yes 'eras'. 1-: The Debuts ("Yes" and "Time and a Word"), 2-: The Main Sequence ("The Yes Album" through "Going For The One"), 3-: The Middle Years ("Tormato" through "Anderson Bruford Wakeman Howe"), and 4-: The Dinosaur Years (meant with affection!) ("Union" to present). Of the 'Dinosaur Years' "Keys to Ascension 2" is probably the best it gets (although "Talk" was pretty good). Of the new studio tracks most are fairly average offerings i.e., nothing too diabolical but nothing that strikes with any brilliance either. 'Foot Prints' and 'Sign Language' probably get at least half marks. In contrast the opening track 'Mind Drive' is an astonishing track that some deemed was the best thing since 'Awaken' almost twenty years earlier on "Going for the One"! It has an atmospheric opening before a pulsating persistent riff kicks in. Much of the melodic and lyrical construction of the track is hardly comparable to anything found in 'the Main Sequence', but the music and the experimentation with an extended structure is. 'Mind Drive' certainly is one of the highlights of recent Yes concerts, full of energy and a reminder of how brilliant the group were in their heyday. The album also has the 'classic' Yes line-up (White on drums), which does it a lot of favours. It is difficult to fully assess a record like this due to the fact that the first disc is made up of live performances of classis Yes tracks, and the second is brand new stuff. The mark here will reflect the second disc only. In any case, the CD is worth purchasing solely for 'Mind Drive'. Anyone with any interest in Yes is unlikely to be disappointed with this track. If the only track only is not enough to sway, then at least you'll have the live CD.