I"d disagree...any beginning R/C flyer could fly one of those units as well as they fly a current trainer. The model used rudder and elevator, or rudder, elevator and throttle. The control surfaces pulsed, but at a high-enough rate that the model didn't oscillate with the controls. You used a regular stick to control the model. The systems with throttle had two buttons...one to increase throttle, and one to lower it. Changing the throttle could cause the model to give a brief nose-up or nose-down pulse...nothing outlandish.

A friend and I used to fly some galloping ghost models in our late teenage years. The airplanes were designed for them and were very easy to fly by any standard...almost free-flight models.

Now, a "master" could do some amazing things when the right model was used...you'd not believe the aerobatics possible from such "simple" models!