It worked perfectly for my church, in order to eliminate hum/white noise in the audio from the cable that connects the mixer output to camcoder's audio input, while using it in conjunction with a DI box.  The XLR is connected to the DI Box's output while the 3.5mm is connected to the camcorder.  The mono audio is connected to both left and right channel, so I don't need to do any post-editing.  I also wanted to get the right-angle (L-shaped) plug to reduce stress on the audio port.