That does look interesting! It is said to have 10X to 200X magnification. That should cover the ranges we find best for viewing our honing. The internal lights could be a help or a hindrance. May be that the light source pointed from the lens will show up scratch patterns better than not.
I don't know whether it is good or not but I have spent a lot more money for a lot less of a product.
Thanks for the pointers to the site!"
~Richard