I had a listen to these as well. I'm not clear if they were designed to be customs or made-to-order universals, because I got the impression it was possible to order a universal fit option like the demo unit, with custom faceplates?
The sound itself I thought was impressive. Quite a rich and coherent sound, good headspace and detailed but non-fatiguing highs. It actually reminded me of the ASG without being cloudy and cavernous. If the price is for a custom, that's understandable. If the price was for a universal fit then it seemed very high considering they were a bit large and unwieldy, especially against their logical competitors the K3003 (and upcoming GR08).