Hi, I've bough this in addition to my Linn DS in another room and to be honest the sound quality is here.
I am using Openhome on a Raspbian/Raspios distrib (carefull the december is not working with it (issue when spi driver is initialized) but working fine with 5.4.51-v7l+ #1333 SMP Mon Aug 10 16:51:40
After few devs available here : https://github.com/jchassin/ohPlayer , it works with Oled screen scripts provided by Audiophonics in Moode distrib.
So I have a multiroom, Linn DS on one hand and Raspdac Mini on the other, up and running with Qobuz streaming service and driven by Linn Kazoo app on my iPhone.
Please star my github ohPlayer if you use it so that I'll know how interested are people in this dev.