After watching a lot of his videos on YouTube I got a bottle of the 1 micron, and a kangaroo strop for my KME. The was the first I've ever used any diamond emulsions, so I have nothing to compare it to, but I'm impressed! I wasn't going for a polished edge, I just wanted to see if got a keener edge. Now I can drag a hair over the blade and it will split it...most of the time anyway. I couldn't quit get there before. So I do feel there's something to it. It seems like a bottle will last a long time too.