My husband is a big fan of the MACH3 razor from Gillette, so it's no wonder that blades need to be bought on a regular basis. Protect the blade itself and offer a great shave, which is well tolerated, so that neither redness nor pimples occur. In addition, the blades last a long time, so a blade several shaves quite endures and is very late blunt.
For this is the current price of almost 14 EUR (as at April 2015) perfectly fine, since the blades actually keep their promises. We are satisfied and they will continue to buy more on a regular basis.