I was swinging through Bimart today, saw one, and bought it. Took about 40 minutes and sharpened all of my old fillet knives, and kitchen knives, and hunting knives. Wow! Worth it in how scary sharp my knives are. Filleting 6 fish was a breeze with a cheap Rapala fillet knife, you know, the $3.00 ones you buy in a bucket. Amazing.