This is kind of useless now after the wealth of Zeppelin live material (both audio and visual) released a few years ago in the form of the Led Zeppelin DVD and How The West Was Won. Shit, even the DVD does the same MSG performance better justice if only because there are no ridiculous fantasy sequences getting in the way. And it's wayyytoofuckinglong.
HOWEVER, it's Led Zeppelin live, in pretty good form, pounding away through their greatest songs up to that point, and the occasional flashes of brilliance are well worth it. Also, much like Some Kind Of Monster, captures the absolute pinnacle of near self-parodical rock-star excess, a portrait of a band who are entitled to do whatever the hell they want.