After my 10 days with Polsilver blades I decided to give these blades a whirl. My looking around the net gave the feed back of smooth and shortlived blades. Many folks say they get 4 shaves out of them. My first shave with them gave me 90%+ of the performance of the Polsilver blades and each shave grew less effective although still smooth feeling .Until this mornings 3 pass shave ,which was shave 5 on this blade the results were still pretty good.This a.m. the shave left perceptible stubble.At the end of work 10 hours later I felt like I needed to shave again. I'll set the pack to the back of the cabinet for emergency use.Or snap one in half and see how it fares in a shavette.