I've got extensive experience flying the kit version of this plane, which has been one my favorites. Mine is powered by an OS 70 Surpass, and can fly almost unlimited vertical after a ten foot takeoff run. It tracks very well and is unusually stable at very slow speeds. I cannot coax it to tip stall at very slow speeds at a ridiculous bank. Being only an average sportflyer, I'm not qualified to comment on it's ability to perform pattern sequences, but I will say it is the one plane that I've spent the most time trying to fly "in the box", usually back and forth with a split-S, stall turn, or other simple turnaround maneuvers, while trying to keep my speed constant and the large half loop "round". I did get an opportunity to fly the ARF version recently, powered by an OS 65 LA, and was surprised at how similar it was to the kit version, except for the powerplant characteristics. It is definitely fun to fly and the best landing plane I've ever flown. With the .70 and a Graupner 12.5x6, I can split-s it out of a large loop into a landing (the propeller braking with this combo is amazing). I hope this helps, maybe some others can add their thoughts. Let me know if you have any other questions.