I saw this film in 1978 at a cheapo midnight showing. I recall on the downside that the copy run that night was miserably cut, scratched, spliced and filled with horrible audio glitches. However, as a drooling ELP fan (Palmer was the primary influence for me to pick up a pair of drumsticks and play- something which led to a long and fairly successful music career), I can say that this film is a pure treasure trove of great images. My brother (a keyboardist) got good looks at Keith on the Hammond and so figured out difficult to pick out chords, while I was totally blown away by Carl's absolutely explosive drumming style and overall showmanship. This is a great concert film and I highly recommend it to any fan of the prog-rock genre. Oh, the original Mussorgskiy piece "Pictures at an Exhibition" actually saw a boost in sales as a result of ELP's high energy treatment which was released as an album of its own in the early 1970s (1971 or 72). Find this film. You won't regret it.