This was amongst my first albums purchased in 1969, but unlike the previous reviewer, I loved the first side of the original album, and don't agree that the Nice were not an album band. There's no doubt that their live act was masterful and that Rondo was up there with America at the spearhead of their energy - so much so that this became a mainstay of my own rock act and remained so for around 25 years. However, the energy of those acts very much covered over the fact that the fundamental material was really quite shallow by comparison not only with their own album tracks, but also with the subsequent music that poured forth from, of course, ELP, but also from Refugee, the band that the remaining members of the Nice formed with Patrick Moraz, but which was unfortunately cut short by PM's absorption into Yes.
Their album tracks demonstrated a depth of musicianship well beyond this single theme stage stuff, and nowhere more than on this album. Asrael revisited could almost have been a forerunner of Van der Graaf Generator or even early (Peter Gabriel era) Genesis, whilst For Example has to remain the most novel and multi-textured variation on the blues that I have ever heard by any band ever.
So in addition to enjoying the instant gratification of the live tracks, try a few listenings of the studio material - as with all highly structured and textured music it takes a few listenings for it to "grow" - and I'm sure you'll agree that there's ample room for both.