Yes, I do think it's an improvement! Good idea separating it out, the way it will(I assume) be done when the graph is integrated.
Thanks for the feedback guys.
1) swear up and down that your knives which haven't been sharpened in a decade are 'razor sharp' and get offended if someone implies otherwise
2) buy all new knives, throw away old ones
Just a couple more points cowboyardee.
(1) I thought I heard shun was discontinuing sharpening service, but maybe I am wrong. Regardless, some places such as Japanwoodworker provide free sharpening. You only pay postage, so some of the professional services can be quite cheap.
(2) I wouldn't recommend adding this necessarily, but sandpaper is always an option. I think Chad Ward went into some detail about this in his book and offered it as a cheap option if a person doesn't want to invest in stones.
Just thought I would mention it.
"What happened to those other underpants you had?" -- Flight of the Conchords
I think you should add another line: potential disaster factor.
Some of these methods are very unforgiving. And some will ruin you blade even if used as recommended.
Though I could not caution all I still might warn a few; Don't raise your hand to raise no flag atop no ship of fools. - Robert Hunter
How would you score these devices in terms of disaster factor? That's not really a rhetorical question.
My thinking has been that such a category is really difficult to score on its own. Look at other sharpeners. What's easier to destroy a knife with - stones or an Accusharp? The answer is gonna depend on the knife in question. Or consider a hone - it's very slow and occurs over period of years, but lots of people ignore their knife's heel and wind up leaving a lot of accordion cuts.
My hope was that the 'versatility' category would give most of this information. But maybe we need another category to point out that being sloppy with a Chefs Choice electric sharpener can result in serious damage?
I think the potential for destruction is part of "ease of use". None of these are difficult to get to work(you don't have to crank them), its difficult to get them to work properly.