^But this leaves out some issues with the Worksharp that I noted earlier. First, it struggles with numerous thin blades, including common kitchen knives, being able to sharpen at 15, heck even 17 or 18 dps. It just couldn't handle it. Sure you could jury-rig it to work at lower angles as someone suggest, but why not just get a tool that can just handle ALL your knives, from the get-go, at a nice lower angle like 15 dps? Sharpmaker can.
Second, I actually used the thing for a few days and the more I used it, the more I realized the design of the tiny sharpening block area is a design defect or at least a serious limitation. It's not stable while you're grinding with it. The sharpening block has a tendency to roll over a lot, and while you can compensate by using REALLY light pressure, that in turn lengthens your sharpening session massively. I could really tell the difference when I recently got an Edge Pro. I don't see any way in their design to work around that issue in the Worksharp. If you grind carefully with the thing to prevent that 'rocking', it takes at least as long, or longer, than sharpening with Sharpmaker. A device that's already known for it's pokey sharpening results (due to the small surface area of the stones).
So what it comes down to is, sure this system is $50, but what's preferable: a $50 system that doesn't work at all on some knives and doesn't sharpen down to the angle you want on others, or a $125 Sharpmaker ($70 for base + $55 for diamond or CBN add-on rods) that has more sharpening media options, sharpens all knives even serrated/recurves/scissors, actually works at the lowest expected angle on ALL your knives, and doesn't have weird ergonomics causing irregularities in your sharpening results?