1.) the connectors on them grasp most rca plugs WAY too tightly. this can be very bad in some situations. some installers here have that the ground jackets come off off the amps plugs when unplugging the rca's2.) their method of noise cancellation is just twisted pairing. they emit as much noise into the system than those 10 dollar walmart rca's alot of people bring in to the shop to get installed.
3.) I have seen a few with moisture developing inside the jackets in the middle of the cable. turned out there were leaks in the black splitting ends on the cable. i wouldnt use these in a marine application.
4.) the o-rings this cable uses to ID each plug pops off the connector ends and get lost, i have seen guys installs brought in with no identification left, therefore yoou have to test each plug on the cable to find that plug is for what.
for the money, stinger is the way to go IMO and in my experience
(i am only talking about those karma rca's btw)