These are nice, quality blades. I see them as about equal to derby in both sharpness and longevity. 5 comfortable shaves, no pulling. They lose marks on packaging because there is no dispenser or used blade compartment. They are well wrapped though. The only thing that sets these apart from Derby blades is the price, which is higher ($0.32 for these, about $0.17 for Derby). Still a very resonable deal, beats $0.80 for russian/swedish gillettes.