I was listening to some new (fine) Charles Lloyd on Spotify and when the record was over, Spotify, as is their wont, began to play supposedly similar things, including an interesting mournful muted trombone-keyboard duet that I realized was JJ Johnson and Miles from this set. I really liked it in this context. I also liked hearing Miles and JJ playing some funky blues though I would gladly give it all up to hear the apparently unrecorded sextet with JJ from the '60s.
Despite a couple of clinkers (What's Love Got to do With It) I was surprised how much I like this set. I heard Miles at the Hollywood Bowl in 1983 and didn't get it. (He was double billed with the Gil Evans band and I foolishly thought he might sit in.) Listening to the Montreal concert makes me realize that it often takes me a few hearings/viewings to catch up to where the artists I like are going e.g. Jean-Luc Godard, Coltrane, even Gil. (Though I've never had a problem with Dylan's many mutations.)