Its all about precise control for me bub. I know EXACTLY how much wood Im taking off without looking. I dont have to rasp, look, rasp, look, rasp, look and so on. I know exactly how much is coming off and when I need to stop............lately the ol' Shinto has been draggin' on, she's dull and needs replaced. I bet I did 30-40 bows with it though, not bad for $25.