Edge Pro allows the user to move the blade on the table during the sharpening process to either follow existing bevels and/or create new specific to user wishes. To some this may be difficult as they maybe just want a sharp knife without thinking about how the primary, secondary, tertiary, etc. bevels, flat, belly, tip, etc. relate to each other. But, to others allows much greater control to be able to produce specifically the geometry they want while watching it happen in a bevel up orientation.