The cable works fine, but is obviously very cheap.
as others have stated this isn't a VGA to RGB converter or vis-versa, its a cable to input RGB to a projector or monitor that supports RGB in through the HD-15/VGA connector.
I used it to connect a cable box to a large data projector, and it works excellently.
One note, the blue and green connectors on mine were swapped. I don't know if this was the fault of the cable or the projector so I only knocked off one star for this.