I have the cheaper Hobbyking 6 channel (HK-T6A V2).
It's OK but to reverse a channel(rudder or throttle) you require a computer running XP and cable.
I also have a Turnigy TGY-I6, a far better unit.
Programming for reversing channels done on the transmitter.
Supports up to 20 models(buy more receivers only) and you can name the models(limited length).
So you can have different setups for each model.
It also with the newer receiver supports voltage/temperature and rev. sensors.
These do not come with servos but these are cheap.
Both units are very easy to bind in.
The heavier kg thrust one rotate the opposite way to stand servo's.
e.g. HK-15269 4.5 KG
HK-15288A 9.45KG(use one to turn the outboard sprint unit with no problems).
The small Turnigy TGY-53317M 3KG is a good little unit.
I was give an old 6 channel 36M unit and the transmitter has reverse switches on it.
Nice and simple!!!!