Great shave better than the Derby blades that came with my razor don't know how long they last(I have 3 shaves on one edge right now) but at this price I can change them more often and not feel guilty. For the add on price they will be on most orders I do from now on. Way to go amazon now just make it easer to search for add on products. Update These blades are not on the "add on" list any more but I would still buy them even after using Feather blades I like these better but make sure that they are the made in Germany blades. I see now that there are Wilkinson blades for much less made in China I have no idea if they give as good of a shave as theses blades you never know and sometimes you get what you pay for.