I just took my first Feather blade out of my razor and threw it away. I had shaved with it NINE times! Amazingly, the ninth shave was still smooth. No pulling, no tugging, no razor burn or weepers, and an awesome BBS shave to boot. Conceivably, I could have kept going with it. I only changed it because I want to start a new blade every Sunday, in order to make it easy to remember when it's time for a new one.
Overall, I have to say that I am extraordinarily impressed! At first I was squeamish about the high price of the Feathers, compared to my normal Derbys. But I can only go for three shaves on a Derby. Ultimately, the Feather is a money saver.
So how many shaves do others get from Feathers?