I had a Kombat Kopter, now I have Kombat Kopter pieces. I only flew it once before lawn darting it. It was purely pilot error, not the gyro's fault. The flight was only about two minutes, but I'll do what I can to help. As far as the flight characteristics, it flew pretty good. There was some instability on the roll axis. The PA2 would definitely help with this. It is flyable without the autopilot, but I think it'd be easier to fly with it. Despite several attempts in good conditions, I never could get it to ROG. When I did get it in the air, I had to hand launch it. The good news is, it was pretty easy. I can't tell you how it's flight characteristics compare to other gyros, since this is the only one I've flown. What I can tell you is that it is a very tough craft. I had a few cartwheels and rotor strikes while I was trying to take-off, the worst I had was a broken servo control arm. If you have any more specific question, feel free to ask.