I've had the opportunity to listen to it on several different systems, including a no-holds-barred large dream rig and have to say that it scaled up extremely well. As a matter of fact the bigger the system, the more it shone.
Probably a bunch of nitpicky little details as the audio imprint of the stereo mixes are so deeply embedded into my subconscious and hard to get rid of, and agreed that some of the Hendrix panning trickery was very difficult to translate into 4-channel format without it becoming gimmick. I don't think that songs like 'Voodoo Chile' (the long version with studio audience) lent itself to much heavy surround effects because as a live-ish performance it would have probably been distracting so I'm glad it was left alone. But in general the rest worked very nicely, with a special kudo for the whole delightful and exquisitely rendered "1983 (A Merman I Should Turn To Be)" suite -> for having tinges of new or previously unheard elements that added some nice atmospherics. I mean, there probably are some guitar balance comments to make on 'Crosstown Traffic', 'All Along The Watchtower' and so on... but none felt like show-stoppers. Just a bit different from what my memory was of the sonic footprint.
So overall, and even though some hardcore fanatics brayed about the two kick drum hits sacrilegiously missing at the top of "Gypsy Eyes", I felt that Eddie Kramer acquitted himself splendidly and in a manner that makes me want to revisit this again and again, whereas (comparing to another landmark album being remixed) I truly feel the James Guthrie mixes of some Pink Floyd material are too 'in-your-face' and arguably somewhat tiresome to listen to compared to the elegant Alan Parsons original quad beauty (DSOTM). As a matter of fact, I feel that if this truly was Mr Kramer's first foray into surround mixing one can very much hope we get to hear more such work from him.
Given the amount of intimate creative interaction between Kramer and Jimi in the studio, I am sort of glad he was the person to do it, hat off on this one. Yes, I probably do bow to more adept surround stalwarts and indeed generally favor Elliott Scheiner, Steven Wilson or Bob Clearmountain for that 'go-to demo disc' appeal, but this was subtle, elegant yet powerful where it needed to be, and well-rounded in every way. I can't really find something to fault on a technical level, it was all down to artistic interpretation; I am very proud to have lived long enough to have 'experienced' this wonderful 50th anniversary tribute to an album which has literally changed my life. Kudos to all involved!
I gave it a '9' because I haven't yet heard the surround album that will make me want to ascend to a higher plane, '10' is reserved for that if and when... LOL
[disclaimer] I do not work for Experience Hendrix LLC or anyone associated with this release, just merely a very enthusiastic lifelong Hendrix listener.