Words mostly fail me on this one, which is beyond great, but allow me two observations.
1. Anybody who claims the Stones didn't still have it at this point in their career is probably selling something.
2. Robert Christgau, who I don't agree with particularly often, was nonetheless on the money when he observed that "If you don't like the Rolling Stones, you don't like rock 'n' roll as a form."
I should add that you can download two CDs worth of similar rehearsal Stones stuff from the same period over here.
[h/t Willard's Wormholes]