I was an early adaptor and ended up sending it back after 2 weeks
The XDA has a very rich feature set for the money but I found it was lacking compared to the competition in that price range. I have a very revealing setup, and with that being said I found the highs where rolled off and the bass was overly boomy. My Monica2 (NOS) DAC fit nicely in that price range and out performed it all around. While the Monica2 doesnÂt go as low as the XDA, it doesnÂt make things sound like mud either. Monica also had better control of the high-end, and was far more musical.
The XDA is OK but you can do a lot better.