Hi Ian
I have two Turnigy IA6 ones which are a rebadge Flysky I6.
Yes they support up to 20 models with different names and setups!!!
Reversing servo direction, limit maximum servo throw and switching for decreasing ESC output for scale speed and non scale speed these are a few great bits I have found so far!!
I have order a Flysky I6 with two more receivers from Banggood.
As for the Turnigy I have no problems, but, you get no servos with them, but, Hobbyking and Trackstar servos are cheap and work well.
The add-ons for voltage, rpm and temperature are very handy for feed back on your model.
Please note the throttle mode is for IC non centering, but, Banggood have a kit to convert it to self centering.
I have modified a number of them in our club, especially for the twin engine tug boats.
You tube is a good source of info on these radios.
Harry Smith