I've had their 330S for a couple of years. As I recall the instructions where some what lacking. I also canned the fuel tank and went with my own. The wheel axels also needed to be replace. I find the short landing gear to be a problem on my landins since I'm a little older. But, Minor fupa's were easily patched and the plane still flies great. I have the O.S. 75 in mine. Oh yes, one more thought, I lost the canopy bolts right off. It's not a good idea to have steel on steel. The vibrations cause them to come loose.