I tried one this morning for a nostalgic shave from the past. Like the Gillette Blue blades from years gone by, gave a smooth, almost BBS shave. Almost no alum block feedback nor any weepers resulted. Seems like the Blue blades in the past used to last for at least a few shaves with no special treatment such as drying off. Will try at least one more shave with the Treet Black Beauty in my Rex Ambassador, setting 3. I have to get rid of these Black Beauties somehow, right?Always seemed to me to be more trouble than their worth. In the 21st century there are better options