The Situtation: I have a Harley Benton Power Plant Jr. on my pedalboard. (I can only recomand this good quality device) Now I needed to get a 12V Pedal powered, buying a new power-source would be an option.
I searched for a while and got to find this cable - so to make it short it had saved me a lot of money. The cabel is build solid, even it appears to look somehow flimsy, compared to the thick usual pedalboard wires. But no need to get worried it´s solid when you handle it well I assume it will last forever.
I have no issues with hum, but keep in mind I use the HB Powerplant Jr. which has isolated outputs. I cant say anything to the possible noise level when you dont use isolated outputs.