Since I was about 10, I was taught how to handle, care for and sharpen knives. Old school wet stones. Over the last 50+ years I've tried many items to save time and still have a very sharp knife. I've even taught my wife and daughter how to sharpen knives. However, it still mostly my job. I saw your ad. It made since quick and easy once the angles wear set. Now whoever cooking can grab the SHAPE EDGE and less the two minutes the knife has a sharp edge again. Quick and Painless.
Manoj Rathod