Criticisms are:
1. The sound quality of the headphone output is significantly worse than on Line Out
2. With my WIN 8.1 computer I have it even after 2 intensive sessions failed to get sound on the computer. Windows installed me 3 new USB sound device (USB Microphone, USB Line IN and SPDIF Sound Device) but no matter what I use, the speakers remain mute.
Maybe someone has the same problem and can give me a tip, thanks.
Therefore, only 3 points.
Update: 7.7.14
Although supposedly driverless, an install of Win7 drivers (WIN 8.1 in compatibility mode) the correct device (USB Sound Device) installed and everything is working well now.
Also the sound coming via USB to the computer is excellent, no further complaints.
Therefore, it is now also 4 stars.