The Powell is excellent, exceeding my expectations, actually. Bud is in top form, even if it is '62. Decent sound quality, very listenable. Highly recommended.
The Pepper is interesting too, though the sound quality is not as good (Art is decently recorded, though). But it's an interesting mix of "old" Art and "new" Art. In fact, it's the most "old-style" Art I've heard on a recording this late in his career. By way of comparison I would consider the VV sides recorded right around this time almost all "new" Art. It's too bad the rhythm section on this one is not recorded better, because it's as good as any rhythm section Art ever recorded with and better than most (and I'm not just flying the Canadian flag here, this was truly a world-class section).