Just got my XDA-2 tonight, and been running it for about 3 hours now.
So far, it is ok. I hope it will improve over a few more hours. I am comparing it to the Aune X1, Schitt Bitfrost, Keces DA-151 MKII, and a Bel Canto 2.5. It is plugged in USB to my computer, and is hooked up to a small tube amp driving B&W DM600 S3 speakers. This is my computer setup.
The XDA-2 is soft sounding. The higher frequencies seem to be a bit rolled off. But, the midrange, soundstage, and imaging are wonderful.
And it can't drive my HD600's worth a damn.
so far, the Aune X1 is beating it in every way SQ wise. But remember, it only has about 3 hours on it so far.....