I love classic Iridium blades. Feathers are OK, but they cause leaks where other smooth blades never get out of hand. Derby isn't awful, but isn't exactly fine either. Sharks need to stay in the ocean, as they bite without provocation. Most Gillette brands from Russia work amazingly well, but Astra SP is my stockpile blade. Cheap, always kind to my face, and I can count on a smile after a shave, even though I might enjoy a far more expensive blade in my razor a bit more if it were there... God bless the St Pete razor plant. They convert steel into many brands, and we all win!