I flew an early version. It was not enjoyable. At low speed aileron authority was minimal. We had plenty of runway so the need to become airborne was not an imperative. Nevertheless, until airflow increased to the point where all control surfaces were working one relied on the rudder and tail wheel for much of the initial directional control.
There have been some derivatives of the original design - the Skystar being one I'm aware of. Most later models dispensed with the combined flap/aileron feature. There's a clue in that.
So if you are a comfortable tailwheeler used to eccentric behaviour from your mount then the Kitfox is for you.
If not, keep on looking - there's better at the price.
Sir George Cayley