I had one for a while. It is a good trainer for hovering, and harriers. With a Saito .82 it did great waterfalls. But it had a pronounced moderate porpoising motion when flying in certain wind speeds which I greatly reduced by scratch building some balsa stabulators. It is not a precision flier at all due to the flexible coroplast control surfaces. There is an old thread on this plane here in RCU for more info.