I bought these for cycling at night and in the mornings (commuting to work). For that purpose they are fantastic. My old glasses would fog up and are too dark for night riding.
I was a little disappointed with the photochromic nature of these glasses. When in a dark environment, I could not identify any darkening (which is great). But in full sun they don't darken quite as much as I expected based on pictures. They still work well enough for me, as I have other glasses for when I want less light transmission.