I'm not a pro or any kind of expert, but I have had one for 3 years and it has been just excellent. I broke it in exactly how it said to in the instructions. It is easy to start, the fuel is readily available ( I use Omega control line fuel w/ 2 oz of castor oil added per qt ) and it runs great- Nice 4 stroke break, plenty of power. When I heard they were back in stock, I bought another even though mine shows no signs of wear at all. Here's a video I made for another forum, from right after I installed it in the plane.