Review on Enhanced ZWILLING 2-stage Pull-Through Knife Sharpener for Optimal Performance by Lisa Phelps

Have sharpened all my handles and they are as good or better than new. It looks like there are wheels in there. After about a dozen uses, slot number 1 seemed to be stuck and I no longer felt smooth rotation. He continued to use slot number 2 satisfactorily, but then it seemed to have died out too. I still use slot number 2 from time to time, but without great results. I had expensive Henkels and wanted the best sharpener, so I went with Henkels. Very disappointing. I may be wrong about the wheels inside, but the bottom line is that it no longer works.