Take the time to learn how to use a set of stones and you will never go back to a machine. I tried 3 different sharpening/honing machines before I tried Japanese water stones, (800 - 6000 grit stones). The machines now collect dust in the shop. You get an unbelievable edge on chisels, knives, axes, etc. I suggest you touchup the edge up before it gets dull, maintaining the edge takes a minute or two, starting from scratch can take 30 minutes. The trick is to raise a burr, which is a slight metal curl you can feel with your finger nail, but cannot see, (use your finger and you''ll draw blood). Then remove the burr with the 6000 grit stone. No matter what you are sharpening, you'll be able to shave with it when you are done.