I started out testing with a couple of Chicago Cutlery commercial knives, a 6" curved boning knife, an a 2 3/4" detail knife. I chose these because I wanted to see if the Sharpmaker could put a usable edge on these problem knives. The boning knife is radically curved, and way too thick to be very good for its intended purpose, and the detail knife suffers from poor heat treat, being far too hard, and yet still unable to keep a decent edge. At the time they were the only dull knives I had( they never get used). As it turned out, the curved knife sharpened quite nicely. I just rotated the knife as I drew it down the stones, so that the edge was presented at the same angle. The coarse stones at 40 degrees cut this steel far more quickly than I expected, and I fairly soon had the relief set. As it turned out, this was the only kitchen knife I own that was more obtuse than the 40 degree stones. The detail knife got sharp eventually, as the edge seemed to chip out a lot at first. Once I had removed a fair amount of steel, the blade started to feel different and became VERY sharp. I guess that the steel at the edge must have gotten overheated during grinding, and once the damaged steel was removed, I got to good steel. I will use this knife from now on. Next up ( after dulling some knives in ways I'd rather not repeat in this august company) I sharpend a Dexter chinese cleaver. This knife has allways taken and held a wicked edge, and did so again with no real effort. A 10" Herders Solingen Chefs knife, which while carbon steel, is much harder ,also came to hair popping sharpness with little work, although I prefer the edge that I get from a Norton fine india stone for this knife. The rest of the kitchen knives I sharpened were, without exeption, very well sharpened. As stated previously, I prefer a more acute edge on my kitchen, and fine use knives, but I'm sure that the slightly more obtuse edges will last longer, and in use, cut almost( but not quite) as well. I will return them to the steeper bevels, but then I'm kind of a fanatic for slicing performance, most people would probably be over-joyed at this level of performance.
On pocket knives is where this sharpener really shines! I just happened to have recieved a brand new Case trapper in chrome-vanadium steel. The factory edge could barely cut. At 60X, the very coarsely ground edge was shown to have a dramatically rolled wire edge om both blades. I cleaned up the clip point at the 30 degree setting using just the coarse stone, except for the very tip, which I like razor sharp. I sharpened the spey blade at 40 degrees with no secondary bevel. after touching up on a loaded strop it will make hair fall off your arm just by looking at it. The clip point now does a very good job on string, cardboard, meat, and just about any all around chore, leaving the spey blade for jobs requiring extreme sharpness. My VG-10 Spyderco Endura got the primary/secondary bevel treatment, and came out very nicely. Five passes with a loaded strop later, it was at an ideal level of sharpness. I pride myself on my ability to hold a bevel free hand, but I have one knife that I have allways had a problem with. It is a Kohorst custom skinner in D2. It cuts like nobodys business, and hold an edge forever, but will NOT shave. I had allways assumed that this was because of the grain size of this tool steel, and had given up trying, especially after convexing the edge. After a few passes on the fine stone at 40 degrees, it shaved hair with no drag whatsoever. This knife forms a wire edge that requires a lot of work( I mean A LOT) to remove, but the sharpmaker showed none, even without stropping. I can't wait to skin this years moose with this edge, as even before it worked better than any other knife I own. In case you haven't caught on yet, I like this sharpener. I'll stick to my Norton Tri-Hone and hard Arkansas stone for really acute edges, but my utility blades will get the Sharpmaker treatment.
It is so easy to use I thought I'd give it the ultimate test...my wife. Unfortunately, I had underestimated the effect of estrogen on tools. Neither my wife, nor my sister-in-law could come close to achieving anything resembling an edge, although my sharpening impaired brother got perfect results. Go figure. All in all, a quality product that does exactly what it claims too, if not a little more. How often do you see that nowadays? 'tho I probably shouldn't be suprised, given that it's a Spyderco.