I posted a few of my thoughts on the Schiit Urd on another thread.
IMHO, a key technology of the Urd that seems to be getting overlooked is the Unison USB interface. Mike Moffat designed this interface to be superior to SPDIF. The Urd uses the USB Word clock to synchronize the flow of data from transport to DAC. A different, and much lower cost approach, than using a Master clock to reduce timing errors.
The Urd USB interface sounds excellent.