Twitchy could apply as could a little fast, but entirely suitable as a trainer. The wind will mess with them a lot, but most problems occur from overcontroling. they are tough as nails and a lot of fun once you progress down the learning curve. they glide ok but they don't have to be flown full throttle as a 40 bushing engine pulls them around just fine.
Are you going to build it with ailerons as I believe some were three channel with rudder on the right (aileron)stick.
Fred