I started my third, and probably final, test run on the Bluebirds last week. I have tried them in my Parker, Blue Tip, Slim and started this time in my Fatboy. All I can say is.....WOW! I take back every bad thing i ever said about these blades. They don't work for me in my other razors, but in my Fatboy they give an incredibly smooth, close shave. When I stock up on blades in the next month or so, I will definitely be buying Bluebirds to keep on hand.