I flew mine on my Kingcat last weekend. Good throttle response, excellent power. It does have a little less push than my P-160's had but all in all it seems like it will be a nice engine. I did have an early version of it that I put twelve flights on before losing the airplane to a mid air. I was particularily interested in the temperatures that it was running because most of the problems I had with the P-160's were related to the high temps they were operating at. The Titan with its 12 sticks, and new compbustion chamber seems to run much cooler. By running it at 123K RPM it should become as reliable as the P-120's, only time will tell.