I been sharpening knives for a long time and one thing it takes to sharpen a knife is "time" period. Now if your like me, I don't sharpen a knife once it gets dull. I simply put it with the dull knives and wait until I get a half dozen or so before I sit down to take care of business. This can be a half day job!
Now last year, my wife of many years (45) purchased me a knife sharpener. I opened the box and read the instructions, then the wife showed me how to put things together. This little electric sharpener was the fastest, easy to use sharpener I ever seen in my days of fooling with knives. The "WORK SHARP" knife sharpener was $62.50 and In 6 months, I got our money back by sharpening all the kitchen knives, my hunting knives and fishing knives. Then sharpened some of the relatives knives also. You can't beat the WORK SHARP knife sharpener!!!