The wiki write-up pretty much has it down. That album is more hippy trippy music with longer songs or suites with more social significance. The production is pretty interesting. Voiceovers and sound effects at the end of the first track.
I would actually say this is a proto-prog album. I wouldn't mind seeing it on the moon. I actually like some of the later Plane as they got better musically. This album shows some of that growth from the earlier records.
My vinyl is worn out, not as much from over playing, but my friends would keep licking the album thinking some hallucinagents were embedded in the tracks.
I do have the cd and would be happy to send it in if there's a consensus.