I first bought the uDAC2 in the fall of 2010, and it blew me away with its quality as it was the first decent source I'd ever listened to. Sadly It stopped working within about a month. I returned it with it's cable under warranty and received a refurb model. Sadly, this new one wasn't sent to me with a cable, but no big deal. Fast forward to this week, and I've just had this one die on me as well.
 
While it was working, I loved my uDAC-2, but I can't recommend it to anyone after going through 2 of them in under a year and a half.