I originally bought the JSAux Dock and shortly after connecting it to my TV it started wrecking havoc with the CEC functions. Volume control would randomly stop working. Was pulling my hair out thinking that something in the AVR stack was starting to fritz out and go.
I pushed them for a refund and swapped to the OEM Dock. Haven’t looked back since. CEC issues disappeared and the dock feels a lot more reliable than the jsaux one.
Also JSAux dock only had windows firmware updaters at the time, so wasn’t a great look for first party support.