I have to say I'm out right now razor beginners. But I have found that the quality of these blades varies apparently. One blade is very sharp and you can order 4-5 times shave while the other out of the box during the first shave looking really something dull impression (for example, they twinge in the neck while shaving against the grain, but the funny thing is that I still do not have razor bumps after shaving with a blade so). This is but as I said not at every blade of case. As these blades in 100-pack really cost anything but I forgive the company Derby like. To say more would I have very sensitive skin (particularly the neck) but with these blades never had an unpleasant feeling after shaving, on the contrary, the skin feels soft and completely relaxed. I can see the blades down to this one little flaw with a clear conscience recommend (all blades were equally sharp, it would of course 5 star given).