Okay so I did some more research and looks like the unit sold by HK and others all seem to be pretty much out of the same factory but seem to be good bang for buck if you can get it to work.
Many seem to have problems with the video and power connections due to different info on the same bits of documentation, not good.
My only complaint is the 5.8mhz receiver gets really hot running from my 3s distro which powers both monitors, both receivers, and a 12v digital voltmeter.
My FPV camera, and both transmitters are powered by a 800mah s3 which gives me about an hour of run-time.
Aircraft is F550 with T-motors, NAZA+GPS, APC 10x4.7 props running off of 2 s3 4000 turnigy nano-techs in parallel.