I've used these cables for a few years now, as balanced output from my audio interface to my studio monitors.
These blow the previous cables I was using out of the water. With these cables there's no hum to be heard whatsoever, and I haven't noticed them picking up any interference either. Only when maxing the volume on my monitors a very slight high-frequency noise can be heard, but this volume would be way too loud for any reasonable use in any case, so I don't see this as a problem.
The build quality is also excellent: the connectors aren't unnecessarily bulky, but rather sleek, and the materials are great and durable.
In summary, these cables are probably the best bang for the buck I've stumbled upon, and I'll be sticking with Cordial in the future as well. In fact, I just ordered a few more of these cables for my second studio.