I used a ceramic rod sharpener tonight to work on a serrated bread knife. The rod was from Chicago Cutlery, it was pretty old, and I have no idea what type of grit it was but it ate the steel pretty aggressively and left a good edge in no time, it was fast! It loaded with the steel quickly but cleaned up easy with wet paper towels. In reading on line reviews about ceramic sharpeners I get the impression that they aren't the best route and that diamonds and aluminum oxide are better but I was surprised how well it worked, at least on that one knife (German steel). If the Spyderco ceramics are as good I wonder why they aren't as popular, or for that matter why more manufacturers don't offer ceramics.