I presently have the Orbitol blade sharpener which was $37.99 plus tax in Canada. I had the Stay Sharp disc one before. Both of them "help" a dull blade but they do not make it as good as new. If the blade has a nick, these sharpeners really don't remove it. The trick is to sharpen your blade before it desperately needs it. A freshly sharpened blade is maybe 75% as good as a new one. With a second sharpening, it is about 50% and a third 25%. I don't even try sharpening after three times. I use my sharpener but don't rely on it totally. A great blade sale is still a very good reason to stock up.