Does anyone know of or have "The All New Electric Muse: The Story of Folk into Rock"?

I have seen a good CD box set version for £30 which, if I go on the values a few sellers on Amazon are asking, seems to be an absolute bargain.

I can't find values elsewhere for this initial box set - there are various derivatives and updates, but this initial set (derived itself from a 3 lp set) seems rare.

But what I'm really interested in is the quality of the sound and if I would find it a pleasure to have. Maybe even educational?

Spotify has this album but most of the tracks are later remastered versions.