There are no problem engines, just problem engine tuners.....
I'll say if you can get a Cheap engine to run properly (no dead sticks/lean runs), good for you! There are those of us that would rather go to the field, tweak the needle and fly for the day.there are plenty of those at my field that enjoy playing with the needles instead of flying. Please understand, I'm not putting any one down for that! I for one enjoy running an engine that was well designed, well manufactured!
Doug