I use the Mini Microscope for about two years for testing knife edges after sharpening (with the Lansky Set u strop.) And for this purpose it is with the lighting ideal - much better than the standard jeweler loupes with 10x magnification. With the control of the microscope you can really optimize the grinding and not poking in the murky or relies on feeling + rates. For the price a super tool - and although I thought after the purchase that it will probably be soon over it already holds but about two years, even with the first battery pack (of course only short applications with light).
