A loupe is a great thing to have for honing and restorations. One thing I find it really helpful with is setting the bevel. If the bevel doesn't go all the way to the edge it can show up as a tiny dark or shiny line right at the edge where light reflects as you move the razor under a light source, but with my loupe I had to be careful cause the lens isn't the greatest and can create a false line at certain angles to the light. What I mean is it created a reflection in the lens and not on the edge. Mine is a cheap loupe though. Once I figured out the right angle it has been invaluable.