I have purchase several Imax DVD'S. I would rank this film better than most(Grand Canyon and Niagra) and below (The Liveing Sea and Alaska. It is more educational but it does not lack spectacular photography. That is one of the reason I buy Imax is to see thing's you do not ordinarely see. Some Imax films try to tell two to four short stories in a film; to me those film's don't work. I do not buy Imax to see pedestrian plot's; I buy to learn and enjoy the photography. This film fits the bill. If your interested in volcanoe's I do not think you could buy a better film.