Got one of these for Christmas. Having never used anything but a file (and was pretty poor with that) or sending it out, I was interested in trying it. So far I am impressed. The couple chains I sharpened are about on par with what I'd get back from a shop. The only thing I didn't like was the directions. Pretty useless IMO. They could save some paper and not include them and I don't think you'd be worse off. Thank goodness for videos posted on the net.