I bought this on vinyl as a young lad way back in the 60s, although I never got to see them live. I sold the LP years ago, so it's nice to see it available again, with lots of extra tracks.
I still think the Art Gallery album is a good one; solid, workmanlike covers, played with bags of enthusiasm (and a certain skill as well, particularly from Jon Lord on keyboards, and Keef Hartley on drums). They must have been great to see live, but I guess they suffered from a dearth of original material, which perhaps resulted in them never emerging too far from the club scene of the time.
The extra tracks are quite interesting, although, I have to say, not stunningly exciting as far as I am concerned! If anything, they sound a little amateurish now!
That said, the whole package is well worth buying as a good indicator of the sort of quality band you could see at pubs and clubs across the UK in the 60s.