Excellent for PC based setup
Initially did not remove all, but most of the noise, was pretty blown away by the difference but still had some noise at higher levels, which together with this device, and some tips on rearranging USB devices (I happened to group my USB input devices into one powered hub I also put the USB mixer on the same hub to see and have not removed it, also makes it easy to switch it all to laptop which has always been black-as-space quiet, and put it all into a different port on the motherboard of desktop PC)...
Anyway, the PC is built with gaming as a primary use, one of my pastimes. It is big, super noisy, etc. Was getting a lot of interference in the monitors. Just dreadful, had to turn the monitors way way down to make them usable. Now I can play games with my video overclocked at any level and there is no noise. Before the whining and the whirring and the mouse movements had my yamaha monitors at one notch up from minimum to get the noise low. This was with everything plugged into a basic furman; ear splitting, migraine/fatigue inducing digital noise. Now the Yamahas are in the "optimal" (the owners manual) position at center detent. I put it between USB mixer speaker output and monitors, and used it to convert final length to XLR for good measure, since the small behringer I am using does not have XLR out.
The noise from the desktop PC has been eliminated, by using this device, and refining the machines USB port arrangement as described above.
Could not be more satisfied with the result this device has helped me to achieve, and must BUMP the potential solution of rearranging/consolidating USB devices and/or using different port(s).
As for potential overall fidelity or signal degradation; any sonic signature characteristics that may be compromised, are easily outweighed by the fact that now it is *useful* rather than disgustingly tedious and/or uninspiring. End result, sounds way way better. More bluntly, before I had an incomplete, even broken experience, now it is fixed.