Let me start this by saying that the bad reviews need to be read from a very skeptical viewpoint.  It sounds like most of the bad reviews were written by people who had purchased this for a mic that needs a different type of cable, or who don't understand the wiring of this cable and it's intended function.  With only one exception, this cable is NOT designed for a stereo camera.  That exception being a stereo microphone that uses a male 3-pin XLR jack to output an unbalanced, stereo feed across pins 2 and 3 (with pin 1 being ground).  Excepting that very rare microphone type, this should not be used for a stereo camera.