I bought a used one recently from
@Amber Audio that he got from Keith. I was planning on getting mine from Purite anyway when it popped up in classifieds.
My reasons for choosing it were fairly pragmatic, if approached from the direction that all dacs sound the same. I'm pretty sure that a dCs or a Mola Mola might have a bit more 'something' than your average £500 dac that measures well, but not having heard any high level dacs, I cannot comment.
When I did an initial comparison between the Soncoz and my existing 30 year old Meridian 203 bitstream dac, I could not detect an audible difference. Either the 203 is an excellent unit, dacs have not improved over the last few decades, or my system resolves no better than a Fisher Price all in one? Whichever it may be, I think it sounds superb using CD via rca, TV via optical, computer via USB B, and RPi4 via USB C. And here's the thing, it has multiple varied inputs, each one can have it's gain level set independently, which allows me to reduce the output level for digital sources into my ancient Naim preamp and have more range on its volume control, plus it adds a remote capability to said prehistoric amp, so I don't have to keep leaping up to turn it down when the advert breaks come in louder than programme material.
All in all, what's not to like? (For me, anyway)