The quality looks virtually identical to mine.
All in all, it's a very unsubstantial - yet vital - concert presentation. It features very few songs and even fewer decent performances. It's also heavily edited. And I'm not talking about the fan inserts (which are annoying enough) but the fact that footage for individual songs is spliced together from two (and what at times seems like more than two) concerts. To give but one example... Elvis actually stopped the band for a second right in the middle of C.C. Rider in one of the concerts but this was creatively patched up for the CBS broadcast.
Vernon is definitely also a bit of a bull$hitter. He praises Colonel Parker and calls him an "honest" man when in reality there had been considerable friction between the two for many years and Vernon had previously wanted (and tried) to get rid of him. He also remarks that Elvis is perceived as a hermit and that it's not actually true - but for all intents and purposes, we all know **** well that Elvis was a hermit and led a life that became increasingly insular after his mother died. Notice also the implication when Vernon talks about remarrying and not having lived in Graceland since that time. Elvis supposedly threw a rage of frightening proportions when he learnt of Vernon's re-marriage and treated Dee (Vernon's wife), who he no doubt perceived as a threat to his precious mother's memory, very coldly. All this just renders the footage even more fascinating, however. It pays to read between the lines!
I've barely watched the individual concerts since they have playback issues on my PC (random freezing in different points every time I watch) and are of a particularly low quality. Elvis' health is not really a detracting issue, though . If anything, it's more reason to watch the concerts for historical reasons and, as sad as it sounds, to appreciate how far he'd gone off the rails.
All in all... decent bootleg and reputable trader permitting, it's a good product that no true Elvis fan should be without. But... buyer beware. Aside from a few heartfelt performances like "How Great Thou Art", "You Gave Me A Mountain", "My Way" and "Hurt", Elvis In Concert should be treated more as an historical document than an exhaustive and entertaining musical package.