It's totally derivative, but that's the fun. I daresay that not one minute is original - but not one minute is bad. You're expected to know the 70s prog rock classics before you hear it. You'll note specific echoes of "Siberian Khatru", "Close to the Edge", "Parallels," plus bits of Genesis like the opening and closing of "Fountain of Salmacis" and the keyboard solo from "Cinema Show."