I have had mine for about a week...love it. I had it up and running in about 15 minutes. I have found a ton of free streaming stations on the internet.
I have been wondering about the quality of the DA converter and the opportunity to improve the sound. I just went down to the neighborhood hi-fi store and they setup a AB comparison between a Duet and a Duet running thru a Bel Canto DAC3. The difference was so slight that you could get more of a difference from positioning a speaker properly. I could not beleive it and the sales guy couldnt either.
It is a great piece of kit, I am going to get a ReadyNAS and put all of my cds on it, then into storage.