I have one. It was my first kit build since I last built a control line kit in the late 60's or early 70's. For me, it took 4 weeks, nights and weekends to build and cover. With a Saito 91, I get nearly out of sight vertical. This plane is beyond a doubt one of the best flying planes I have. Now that he no longer kits these, I don't fly it too agressively.