I, too, was very disappointed in the results from using one of those rotary blade "sharpeners". I am very fortunate, my dh is able to sharpen the blades for me and they are very sharp. One thing I don't understand is why I get a nick in the blade almost with the first cut. This happens with a new blade, not with one dh has sharpened.
Does anyone know if we need to replace the mats often? I wonder if that's contributing to the nicks in the blades.
JoAnne