If ever a band of Miles Davis' deserved the high-intensity inspection/dissection represented by The Bootleg Series Vol. 5, it is his second great quintet. With that man with the horn as the great catalyst, the rapport between pianist Herbie Hancock, saxophonist/composer Wayne Shorter, bassist Ron Carter and drummer Tony Williams is virtually unparalleled in the history of jazz, but to hear the machinations behind their creations here is almost as fascinating as the 'finished product' itself (liner notes rightly suggest use of headphones to hear all the spoken interludes).