As suggested by other reviewers here, this is indeed one of the top prog rock recordings from the golden age of progressive rock. It's hard to imagine something like this being released these days -- fearlessly experimental, theatrical, all compiled by real live musicians. Wow, imagine that. The somewhat dated sound has held up well over the years, too. It still sounds fresh and vibrant, though the recording and production techniques are a bit creaky. A warning to prospective buyers: it appears that there is a version of this disc that has "Aegean Sea" as the first track. Avoid if at all possible; buy only the version with the tracks in the original LP order, commencing with "The System". What was the record company thinking when they messed with this? Shameful. Stick with the original beauty instead. My fond memory of this work: as a teenager, we'd light candles and sit around in darkened rooms listening to this, and inevitably someone would shout, "It's too scary, it's freaking me out, turn it off!" Har har. I sincerely hope that future generations of teens have similarly frightful times with this disc. It's really not satanic, but the kids do need a good scare now and then.