Very cost Effective Despite what people think, I hope you get 51 shaves at least.I was aiming for 50. I have only been rinsing the razor in water. I noticed today that there is a fair bit of soap buildup on the razor head and between the blades. I am going to give it a clean later today and see if that helps. I should have been doing this earlier but the razor just keeps going. The shaves are still good enough for me and I am still happy going on.