Using this one to connect Boss GT-1000's stereo output to Boss Katana 50 MK-1's input with acoustic amp mode to listen to what I play. Cannot say whether Katana's input is designed to be stereo though. But I think that I hear some difference. :)
Anyway, the build quality of the cable itself is good, the sound is also fine. Cannot say more about it and cannot say how it will be doing in a long-term perspective, but I guess it will depend on how I'll care about it.