I came to Graham Bond via the Solid Bond double album of 1970(?) when I bought a 2nd hand copy in the late 70s when I was a teenager! A large part of that is raw and raucous - it was only on the CD issue of his studio albums did I get to hear those - I was disappointed.
Here we have lots of raw material (not as in the recording, but the noise the band could make!). Yes, a few of the tracks are duplicated, but they are sufficiently different to have included them.
Quite often with box sets, I've played them once and then stored them away for quite awhile - but this I regularly get out for the power, liveliness, inventiveness, etc of the performances. I should add that I wouldn't consider myself a 60s r'n'b fanatic and that my preferences would be punk and post-rock - but Graham Bond sits alongside these well! I have yet to hear his solo late 60s / early 70s albums yet. But, I guess, these are his golden years + the tracks that should have been heard at the time.
Just to add: it is largely he that powers along Ginger Baker's Airforce with his raw vocals / Hammond, etc around 1970 and I'd recommend those as well (my elder brother's collection!!).