Yes - I kept it, for sure, even bought a copy for a bassist friend. Rather than under-rehearsed, I should have said 'under-arranged' - there's a lot more compositional potential in the Ellington-Blanton duets, and I was a bit disappointed they didn't make more of that aspect. (John Lewis took a deep bow in that direction on the MJQ's For Ellington album.) But for a one-shot, probably unrehearsed session, it's very nice.