I've used everything from a steel, to crock stix, to wet and/or dry stones, and Ive never seen anything that puts as good an edge on a kinfe as quickly as my Chef's Choice. It does everything from a quick hone to creating an edge on a knife that never had one, and in less than 5 minutes. I've got the one w/ 3 wheels ($100 dollar range). I see where they have a commercial grade available now too. Does anyone else use one of these? What do you think of them?