My first, two steep uses of my current Shark Super Stainless or my no-prep use may have blunted it. On my fifth shave, it would still cut, but the angle had to be just so. After that, I switched to the fresh side and the increased sharpness took me by surprise. I believe side two will last much longer, but my last blade seemed unstoppable at shave 14 and stopped at shave 15, so I’ve got lots to learn.