The opener here, "Hole in the Sky" cannot be faulted. The obligatory instrumental follows (all 49 seconds!), providing a wonderful intro to what I believe (yes, maybe it is better than Sabbath Bloody Sabbath) to be Black Sabbath's finest moment - "Symptom of the Universe", outstanding. Listening to this track you are hearing Black Sabbath at their zenith. THe following track "Megalomania" is a great Sabbath track, a good rock standard, but listening to their catalogue chronologically, you will never hear the band top the heights of "Symptom of the Universe" again, although "The Writ" comes close, as does "The Thrill of it All". Supertzar is an interesting instrumental track, with its backing choir, different to the usual little geear ditties. "Am I Going Insane?" is a good song, but not by Black Sabbath standards, and points the direction that the next two albums were to take.