I've put a few hours on a Weedhopper. As mentioned before this is a 2 axis plane. The one time I wished that I had ailerons was on hot, sunny afternoon. The wind on the ground was light and seem pretty steady. But once I got to 1000 ft I encountered the edges of thermals that would cause some significant roll of the Weedhopper. Until I got past the edge of the thermals it would NOT want to roll back to neutral. This was pretty unsettling and resulted in a short flight. I wanted to get back on the ground pretty quick. After that I never flew the Weedhopper on a hot, sunny afternoon but still had many hours of pleasant evening flying.

I think a 2 axis plane is fine as long has you know its limitations and fly according to its limitations (and yours).