Astra blades provided them with a smooth clean shave and with less irritations than they had experienced with some others. The sharpness seems to keep for quite a long time and the blade dulls very slowly. They are gentle on sensitive skin. Perhaps this is due to the sharpness of the blade that makes it possible to get all of the whiskers in a single pass rather than dragging the razor over the same area several times. These platinum blades rock!