My favorite blades are the Astra Platinums. They seem to work consistantly in all my razors. The Derby's only in some and I can't get on with any of the Gillette, Dorco, Crystal, or Wilkinson blades. Never tried Feathers, although I should. Just learning straights, but my technique must stink because I can't get a hollow grind razor to stay sharp for more than 1/2 a shave even when I've had a pro hone it.