An excellent sharpener -
After years of using a GATCO clamping system -- which worked ideally - I grew tired of the labor, and purchased a Trizor XV. With it my knives are sharper because I dress the blades more frequently. No machine will refine a blade as well as hand-polishing and stropping the edge - but that's only important if you're going to shave with it. I still sometimes use my polishing hone in the GATCO clamp after using this machine, and it does make a difference. My sharpness tests are whether the knife will incise a ripe tomato without pressure, will slice bread without making crumbs, will trim a fingernail without effort and leave a clean edge, and will shave.