First of all, I realize it is a homeowner mower, and you get what you pay for. That said, it's been a good investment, I've gotten my monies worth. The problem I have seems to be a slight vibration you can feel in the bars, engine RPM's seem to be racing a bit higher, and the engine bogs or dies in heavy turf. Mulching is pretty much out of the question. It all seemed to happen at once and has been a bullet proof mower for three years. Can't figure out if it is engine or blade shaft or belt related.