FWIW, I like some of the LTA gear, used to own the Micro-ZOTL 2 (the first non-Berning incarnation). Was a great little amp for not big $, and combined with my Exogal Comet DAC had some folks at a NH show saying it was the best they'd heard from the Senn 800. I also met a couple of the LTA guys at a NY show, pretty nice/cool, with good music taste for the demos.
The circuit is licensed from Berning so it has some standard there. TBD on parts used etc. But what I had was a pretty solid amp with very good sound.
Now, that said....the prices have shot up WAY too much for my liking. And yes, having never worked with stats, there's reservations that are perfectly valid. At a lower price point, I think they'd be worth a listen. But not upwards of $7k.....