This is good for men or women's razors. After years of many nicks, I have not had a nick since starting to do this. You notice the blade getting dull and not shaving as well, instead of noticing how much blood is drawn to determine a worn out blade. And the blades usually last longer. Consistent angle seems to be the most important factor in sharpening a tool.
Latest trend is to sharpen woodworking tools with different grades of fine sandpaper on plate glass.
I am careful to maintain a consistent angle in all steps. The Woodsman's Pal is one of my favorite finds for a packable trail clearing tool. See the tools section in the Knife Center link below. It has nicks in the blade but is still going strong. Its 17inch overall length is the max I can fit in my daypack, so it works well for packing.