ELP was a band seemingly hit by video calamities. Their best shows were either not recorded on video, the footage was lost (California Jam) or the sound recording broke down (Montreal 1977). A pity as they really were one of the live marvels in the 70's - and on their return in the 90's.
Even the Isle of Wight was not filmed for more than parts of the show (15 minutes?), the camera crew simply took a break. We have the sound, though.
So this DVD is really a brave and impressive achievement. It is the best I have seen of attempting to recreate a concert where much of the footage is lost. They have made the best of it, repeating some footage in mostly the right places, and showing a lot of audience reaction (probably not to ELP, though), concert area and local scenery, setting up the right mood.
We also get to see some proper hippy nude bathing at the local beach and a kid throwing a pebble to the sea during "Take a Pebble". Even the two occasions where Emerson is playing Moog and the DVD shows him play Hammond do not cry out if your'e not too anorak about it.
The sound is excellent! Perhaps one reason their opener "Barbarian" is not included on the DVD is that it did not have the same sound quality?
This is well worth for a true fan and for the occasional interested ones, especially if you are wondering how ELP sounded in the beginning. And they were really wild, both musically and as a stage show. Here we fortunately get to see Keith riding the Hammond across the stage and putting knives in it.
The DVD also contains about 30 minutes of interviews, including Keith demonstrating his modular Moog. And there's a good article on ELP included.
I would say definitely buy it, as long as you know what it is!