it arrived today. Too early for detailed impressions but I have been listening for the last few minutes so I can provide some super initial impressions.
Listening with a shouer EJ07 over 4.4mm balanced - warm/neutral tone with deep bass extension, wide imaging and loose "analog" sound. Treble is present but not over-emphasized, with no obvious roll-off. I'm using the device as a bt receiver for now, and compared to other bt devices I've owned, it's no real comparison. Closest in terms of SQ is the ylm b2, which has a AKM4497 dac and produces a warm, bass-rich tone as well. But the b2 has narrower imaging & more prominent treble roll-off.
From what I read about the earlier red R2R2000, it apparently also had an obvious treble roll-off, as well as an audible noise-floor. Neither of those are an issue with this device.
While I'm cautious to comment much on SQ I can definitely comment on aesthetics. It's absolutely beautiful to hold and look at, like a piece of art. I mean at this price-point, I'd hope you would get something well-engineered, but damn, it's beautiful. Only negatives I can see are it's a finger-print magnet, it's quite heavy, and the smoked glass, while beautiful, make me nervous to handle the device without a case. I have a leather case on the way and I hope I don't accidentally drop this brick before it arrives.
Anyway, suffice to say, I'm pleased. But I need more time to get over this honey-moon phase, and give some better "real world use" impressions.
Until then, here are some pics -