I had one of these. I did not buy it as such, it came with a used device I got on eBay .
it worked! it even managed to put my Hugo2 into fast charge mode, meaning it was low impedance .
did it have any effects on sound, No. I didn't even look for such things. but it was well made, with gold plated contacts.
Of course I sold it back on eBay for £25, because I make my own DIY cables.
So I don't know why it has been voted as terrible!
it is an overpriced cable, but it is a decent cable.
compared to the Groundaray , this is actually a wonderful , value for money product.