How often are you asking every ounce of thrust out of an engine , VS how much of your average flying is done at less that full throttle ? Cause once ya aint at full throttle , it'll be the reliability that keeps your plane in the air . Yes , Ive always heard of the YS as being "tinkerers" engines , and if you like tinkering on your engines (I do for me , the mechanical aspects of our engines ARE what keep me from going all electric) then I guess it could be an acceptable choice . But , given all printed reports , if your lookin for "flip and fly" user friendliness , well then go with the OS .....

So do you like a mechanical challenge from time to time , or are you just lookin for it to run everyday ?