I bought a Parkzone J3 Cub this Fall and I was very impressed with how well it flew. I am just re-learning to fly rc planes after about a 25 year lapse. I never really knew how to fly them well before so I am pretty much starting from scratch.
It flew straight and steady right out of the box and although I have crashed it a time or two, the problem was always something that I did, not the plane. I'm pleased with mine. I got some confidence flying the Cub and then I bought a Hobbico Upstar powered glider. I've had some successful flights with the Upstar but the Cub is easier to fly and more relaxing.