I have two of these planes and a friend has two also. The reason that I have two and that my friend has two is that they are a blast to fly!!! My friend and I both have OS .91FX's on ours and they have plenty of power. The planes have a bad rep. But I have found that if you start out with small amounts of elevator they fly great. If you use a lot of elevator, like 100% they will snap like a scalded dog!! We use low rate at 35% and high rate at 85%. Stalls are gentle and straight ahead. On high rates the thing will tumble like crazy.
With a APC 13X9 they are a bullet and hard to slow down when it's time to land. A APC 15X6 gives you a lot of thrust but is to slow getting the rev's up. We have settled for a 14X6, good thrust with good engine response. They are also one of the best ground handling airplanes I have ever flown. They are not for beginners, They are a little Quick!!!!!

P.S. With a little paint they also look great.