They kinda work, so there's that, but they are insanely glitchy.
I use them for guitar pedals, for at home they work fine, when you fiddle with your pedals and move the cables a bit they can stop working or create loud sparky sounds through the speakers , but I'm fine with this since a 6-pack costs less than one single cable of higher quality.
However if you play gigs, these aren't reliable, go for something of higher quality.
Basically: OK for the money, unreliable, don't gig with these.