I've been using these for a year. I make hundreds of cuts on a single blade before it wears out. In my experience they break before they stop cutting or cut sloppily. But the last 8 blades (use 1 about every 1.5 weeks) warped and wouldn't budge after a few dozen cuts. I don't know if the coronavirus has somehow altered the materials they use to make the blades. Still excited about them. I don't recommend buying them until the manufacturer figures out what has changed.