I asked about knife sharpening a year and a half ago. In the end I stuck with using whetstones, partly out of an expectation (from YouTube videos) that this method could deliver really good results, and partly because I was interested in learning something new. While I can now get a pretty good edge, I’ve never been able to duplicate the extreme out-of-the-box factory sharpness on the nice knife I bought two years ago, so I’m interested in upgrading.
It looks to me like the Worksharp is one of the few devices that strokes the metal in an appropriate direction, i.e. perpendicular to the edge of the blade. On top of that, it includes super-fine abrasive belts that look like they can give you a very smooth edge that reduces friction/grabbiness (like a razor blade, rather than a very sharp wood saw). Based on the reviews here and in the actual performance shown in the video @running_coach linked to, I’m now leaning toward getting the Worksharp.