Well, it's not really either (subtle or sensitive) but you have to be impressed by the musicianship of these three, shown at its best when they are playing together fast and furious - such as passages from Tarkus or Karn Evil 9 - rather than some of the long solo's which were probably great to watch if you were there on the day, but not so great to listen to after the event.
But then, this is a live recording, so you expect imperfections. Personally, I find ELP's studio albums sound a little bland - to me, their epics (Tarkus, Karn Evil 9), come alive on stage, even with the odd bum note (like at the very end of KE9). "Hoedown" is another number that sounds so much better live. The high point of the album is probably "Aquatarkus", as other reviewers have noted.
Of the solo spots, Greg Lakes is the best. "Piano Variations" is a little too frenetic for me, but Emerson's piano really shines on "Take A Pebble". Carl Palmer is blindingly fast, and a great showman, but again it's probably more impressive seeing him play live, than just listening to the solos here.
ELP may have received their share of criticism and yes, some of the lyrics on say Tarkus are truly appalling ("preacher says a prayer, save every hair on his head..he's dead.." ?? Oh dear!), but ELP set out to entertain and boy, as a live act, few could match them.
One minor criticism of an otherwise excellent production - both Tarkus (including Aquatarkus) and KE9 are each listed as being just a single track, which is annoying.