They are mediocre at best - Better than stock power cables, but
- they are made with OFC cdopper - UP-OCC coper far superior
- they appear to use a conventional geometry, so a higher noise floor than other options
- they have cheap plugs with brass contacts - not good
I saw some advertised on Canuck Audio Mart priced at $250.each
For that price buy Zavfino - they are very good
Fina OCC Power Cable 14AWG - ZavfinoUSA
Regards - Steve