A great cable for a low price
While cheaply made the cable does an excellent job and I am very happy with it.
it must be noted though that this cable will not work on PAL n64 or snes consoles. The PAL n64 is incapable of rgb, and the PAL snes requires different components inside the cable.
I see there is another review saying it just goes to black on newer tvs, I'm willing to bed that user is trying to run it with a PAL console.

A great product if it matches your hardware.

Excellent rgb cable
Excellent rgb cable for Gamecube, worth having this cable.

DOESN'T WORK ON SNES
The screen stays black or becomes darker and darker...
I tried several TVs, but all of them had this problem.

DON'T BUY THIS STUPID CABLE FOR YOUR SNES, it will simply don't work with newer TVs!

No title
Despite being "gold plated" this cable is actually low-quality one. It is not wired properly. Obviously chinese never bothered to test it. If you experience image jumping and skewing, or black-outs, read how to fix it.
First error: Orange wire should be connected not to the SCART pin 16(BLNK) but to the pin 8(AV/RGB switch). Leave resistor between pins 8 and 16 intact, it is needed to reduce voltage on pin 8 to acceptable level. Some PS2 SCART cables have this wire swapped with ground wire instead :) BTW both mistakes can damage you TV or console.
Second error: composite video signal (white wire connected to pin 20(VIN) ) is connected directly, while proper nintendo composite AV cable has two additional components inside the plug. Disconnect the white wire from pin 21. Connect it through 75 Ohm resistor to the pin 18(BLNKGND) and through 100-200mkF capacitor back to the pin 21( + to wire, - to pin 21).

Perfect for snes
This worked for me perfectly. Gave an excellent clean picture. A big improvements over the composite cables i was previously using. I didn't need to modify the cable either for a PAL snes. :D