One of the training instructors at my club took my Simple cub up in the air for a test flight and said, "if you can fly this model, you can fly almost anything" then laughed.
I didn't think it was a particularly hard plane to fly, once its up in the air but take off's and landings where tricky. I have flown much easier planes than the Simple Cub, but I have also had some a lot more difficult. I built a mighty mini version 3ch, that's even more of a pig to fly than the full size version
, that had several crashes until I got the setup and motor selection right.
They reckon you need coordinated turns for high wing planes like the cub (which is true for the big balsa scale versions), but I found it easy enough to fly bank and yank. A bit of rudder did make turns look nicer, but rudder wasn't really a necessity.
That is until you came in for that last approach turn at low speed, rudder as opposed to aileron is the order of the day.
It really loved to drop that wing in the slow approach turns, using ailerons. I got around it by keeping some throttle on, at least until I straightened up on the approach then eased back on the throttle once it was level.
Altering the incidence of the wing also improved the glide characteristics (I lifted the rear of the wing, by 1mm) can't remember who told me about that tip but it worked.