I have a similar setup but don't you find the latency to be bad? At least it's not good enough for video calls IMO. It's fine for streaming to an audience or recording.
With random chinese knock-off and GoPro 3, I had a latency of 10-11 frames when doing 60 fps stream.
It was usable for video calls, but I had problems with reliability (old battery in Gopro, and even if it was permanently connected to power source, it charged only when I turned it on -- which usually was when I wanted to have a call).
