These blades work very well. I was using a 5 blade setup before getting these ones. I honestly think that raking my face every day or two with 5 blades was worse than only 3. I have sensitive skin, so any shave is not the best for me, but these blades are better so far. I'm only on my second blade now, but the first one lasted just as long as the old 5 blades I was using and paying more for. They last me about 10-11 days (not shaves), as did the 5 blades ones. Keep in mind I do not try to "stretch them out" and get more shaves out of them because of the sensitive skin.
My only complaint, and I'm not deducting any stars for this, as I knew it when I ordered, is that there is no exposed blade across the top for trimming around a beard, or sideburns etc. I still have a need for that extra blade, but for now I can use the one on my wife's razor, until Rocky comes out with one themselves.