The Primo is wonderful. Sounds great both using the built in DAC and using a good separate ESB DAC. Big, huge detailed soundstage. And the folks at Volumio offer terrific support. When there was an error in the power brick connector, they made it right in one day, helping me get an even better power supply. The only issue I have is that occasionally my IPhone app will not find the unit, and if you power it down it may take a few minutes to regain all you songs and music services. Regarding the Iphone app issue, all I do is go to the Web page and that always seems to fix it. Thanks so much for a great product and terrific service. It's all about the music!