It's really good, as is the following volume, Zenith, with Charli Persip, Barry Altschul, Dave Holland... sorta double trio action, I guess, or along the lines of a Schlippenbach outfit I saw, 2x3=5.
Wrote the notes for the next volume of Rivers' archival material on NoBusiness CD, a Keystone Korner set from '78 with Holland and Altschul that's very heavy.