Well, I have successfully learned to fly the Superstar EP. Nice little plane! Knife edges and loops are not a problem, and the handling seems pretty crisp for a trainer. I ended up ditching the Sky Sport radio and bought and installed the Tower Hobbies 6XM, so I could set my endpoints electronically and also have the expo option. Without this radio to help, I don't think I would have caught on. I don't even care to fly the Skyfly anymore, tried it after the Superstar and it just feels laaaaaazy.