Have it.
It works. Nothing spectacular, nothing bad. It just works. Its quick and easy for those who don't want to deal with stones and such. Or if you have extremely dull knifes.
After sharpening a couple of knives, mostly kitchen knives, I have found that most of my problems come from the black plastic guide.
The black plastic guide gets in the way, you sometimes can't sharpen all of the knife edge. Thumb studs, knives that have an unground part at the heel.
Solution: Take it off and freehand it.
The belt is standard size: 1/2" x 12"
You can get the belts either from stores with the WorkSharp or other places like McMaster-Carr. I have looked around McMaster website, the website says to ask them if you want other grits from what is listed on the website.
Haven't used on axes, machettes, scissors, or anything else with an edge yet. I'll come back after I sharpen them up.