For the sake of full disclosure, I have designed a fair no. of knives for Gerber including all the A/F folders for the late Col. Rex Applegate as made by Gerber. I have not actually seen or used the Gerber pocket sharpener listed at the website you link. My thought is that for being able to do any type of edge in the field we are better off with the diamond in a survival kit. The small pocket sharpener may be ok for light touch up but I want to be able to restore an edge after hitting rock, steel or bone. Bill