This is actually my favorite ACG album. Studio album, I mean. (Live at the Whisky, 1969, is my all-time fave.)
It has some spacey qualities, ala Barrett-Era Floyd, and it has a dark, scary quality like the early Doors.
The arrangements are totally off the wall.
I especially like the twin guitar work of Buxton and Bruce. The rhythm section of Dunaway and Smith is good, too.