seyo
If I am not wrong, "Live Etc." was the only official live set released during the band's career in the 1970s. It is a very good collection of stage performances focusing on the most important aspects of the "Radio Gnome Invisible" trilogy + two important tracks from "Camembert Electrique" - "You Can't Kill Me" and "Dynamite/I am Your Animal".
The original double LP set was perhaps too loaded with crazy psyche jams and D. Allen's extravaganza that is not meant for average listener, even not for average GONG fan. The entire package may be difficult to digest at first listen, particularly if you are not prepared by having earlier tasted a portion of RGI trilogy for a starter. However, the live renditions of the tracks taken from "Flying Teapot" and "You" albums in particular are simply amazing. If you are a fan, get this album, if you are not - try first to listen to studio albums.