I have been using the Volumio Primo bout a 1 mount. Analog output sound amazing. USB output via external DAC sound very good. I did not try SPDIF output. Streaming via Bluetooth sound very good. I bought Primo for his HIFI performance, but software is not working for me, SW is often get stuck and get lazy. Running from Android Cell phone. There is no real synchronization between Tidel/Spotify application to Volumio SW. For example: Spotify app. gives a list of music recommendation mix, all most daily, I can not get it via Volumio SW integration. For paying extra 3 euro per month I expect software will be more effective.