Victoria bought me one of those knife sharpeners for Christmas last year. I looked at it and thought it there was no chance it'd work.
I stand corrected. I love the thing. It makes a hell of an edge. My only complaint, and it's not really even with the product itself I guess, is that it can't handle large things like cleavers. I have to put a cutting board on the opposite side of the knife to elevate the roller as I sharpen it, if that makes any sense