It is pretty marvelous. And the "old" Mingus has great value also, just different. HIstorically, I have to assume that these were lost in the ether due to both likely limited distribution, and the crystalization of the "new" music on the Atlantic 'Pithecanthropus Erectus'. But I listen to this and the 'With Max Roach' companion album a lot more than I listen to that Mingus Three (also lost on me), and the albums on Bethlehem, which seemed like a step backwards in some ways. Seemed to take another leap forward on 'Mingus in Wonderland', and another yet on the Columbia albums.