How about ... I wanted to tell you that after 4 or 5 days of intensive listening and leaving the Qutest working 24 hours a day the sound has changed significantly. Now I notice clear differences between the integrated dac of Node 2 and that of Qutest. Being the latter much more detailed, sound more open and airy, more dynamic ... well, everything has improved so much that I can not stop listening to music through Roon. I also have it connected to an endpoint consisting of a basic notebook with very low-resource ssd and it works very well. I find it difficult to find differences between the Node 2 with optical connection and the notebook with USB connection. Thank you and sorry for my English that is not my native language.