If the beginner has learned the most he can learn from his trainer then a super sportster, ultrasport, kaos, tiger 2...etc would be perfect as second plane. The problem arise when the beginner is still sweating a landing or a slow and low pass with the trainer and he/she thinks they are ready for a low winger. But since we can find more than one shade of red there are other birds for those that believe are ready to move up to a low winger. In my club the Sig Astrohog became extremely popular for its size and forgiving characteristics. Eventhough it is a low winger it behaves very docile and stable at a good variety of airspeeds. Everyone that transitioned from their trainer to the astrohog made their first take off alone and with no surprises. IMHO I believe the ultrasport is a great second plane that let you enjoy slow flight and move to heavy aerobatics but it all depends on the ability of the new pilot.