i have had my paperwheel sharpener for about two weeks. man, this thing gets your knives scarey sharp in about 5 mins. the only down side is that you have to watch your grind carefully not to take off too much metal to get the edge preped for the paper wheel to polish the edge to razor sharp. the blades get so sharp that i can do the paper cut test and cut the paper into 1/2" strips by only pushing the blade into the paper, not slicing. i sharpened my kitchen knives but didn't sharpen them too sharp. don't want to come home and find my wife bled out on the floor. she has cut herself before because she wasn't careful with what she was doing. these knives now take your undivided attention when using them.