I just "burned in" my Wyred4Sound uDAC for a week solid.... It sounds awesome, especially paired with AudirVision + Player software. Just for kicks, I swapped out the uDAC and installed an Audio Engine D1 DAC and listened to same Playlist. NO comparison. I found the uDAC to have excellent sound stage, presence, depth and clarity across entire spectrum. The uDAC is quiet when it needs to be, and lively when its appropriate. I especially like the fact that the uDAC is tight and punchy when the track calls for it.
The AudioEngine D1, in comparson, lacked all of the above.
In summary, your uDAC is an excellent product (!)