Just installed my uDAC 2 upgrade. I finally decided to go for it. IMO it's a pretty incredible difference, for the better! Mids and lows sound a lot tighter, and there is better separation in the sound.
I did have to install it in "backwards", as I noticed the PCB of the uDAC 2 was slightly larger than the PCD of version 1.
Volume control is handy, as is the less obtrusive white LED.
I don't see Nuforce making a lot of money through the upgrade, so if...