I have had this less than a week, yet I have been invited to review this. The CD that came with it, I think, is Blu-Ray. It would not play on my PC but did fine on my BRP. I was not terribly impressed, but I have watched all the available online videos that are officially associated with this. There does not appear to be much of a learning curve for standard kitchen blades or large folders. I reprofiled, then sharpened a 14C28N paring knife. It went from being OK to being terrific. I matched the angle on my Nakiri (Gehei). It went from very sharp to "I really need to be careful with this one" rp. The WE is simply way too expensive for me. I considered the KME. Probably what pushed me towards this is the the inventor answered the phone when I called. He was very friendly and in no way gave me the impression that I was being a nuisance or that he had other things to do. So far, I am very pleased with it. The hardest things for me has been learning to use my right hand to hold the blade in place. The sharpening motion is quite easy with my non-dominant hand. Other sharpening systems that I own include DMT benchstones (large), a DMT "fixed" angle sharpener, SSM, and WSKO (that was my first). This is by far my favorite.