Purchasing process was seamless. The 4 bladed prop I ordered really caused my boat to be able to get on plane quickly and to maintain plane at lower RPMs, better control and ride while saving fuel in the process. An excellent prop for my Royal 16 SS with 50 hp 2 stroke engine. I am able to maintain plane at 15 mph. I haul a lot of weight so less plowing more planing was my need and the prop allows for that to happen.