I still haven't been able to fully evaluate it since I'm still sick. Personally, though, his live performances like that which are so different from the original recordings appeal to me. I don't know how exactly how I'll feel about it yet, but it's good, definitely better than average. Up to this point, my favorite live recordings have been "Winterland" and "Hendrix in the West." Exactly how the Los Angeles concert compares to those two, I don't know yet.
I haven't seen any of those negative reviews that you are referring to. However, if they're coming from other Hendrix fans, I would have to take it with a grain of salt. In general, I don't identify with many of the other fans who came to this late in the game when Alan Douglas was screwing around with the recordings. I can't identify with that and wouldn't want to. Hendrix had said he never wanted Douglas to have anything to do with his music, and he was right to say that.
Some of the people complaining may be some of the same ones objecting to the album cover. But like someone once said, you don't listen to album covers. But if this concert isn't "real Hendrix," then I don't know what is.