I remember hearing a Japanese Audio Note Ongaku at the Stereophile show in 1991 (?) (early 90s-ish) in San Francisco, before Peter Qvortrup had his notorious break up with the Japanese branch to start British Audio Note.
It was being demo'd with Audio Note Speakers, and I was incredibly underwhelmed by the sound. I couldn't believe it, so I went back several times, and it was the same, just not that that. Peter was very aggressive with his pointed British accent in asserting the excellence of things, but I just shrugged.
It is a gorgeous object, and I don't doubt that in a non-show setup it would change my mind on the sound, but at that time and place, nichts.
So much for evaluating things at audio shows in hotel rooms.
Nick Gowan had one at his repair shop in Campbell (at least I think it was Ongaku, just gorgeous), although It might have been the British Audio Note version that he played while working. At that time, he had it at the front desk in the place (a small house). It was hard to evaluate because he kind of had them set up as a garage system for his workplace, heh, heh!