I was T-boned while wearing these glasses, and not only did they actually protect my eyes from the shattered glass in my face, but they didn't get a scratch on them. That right there gets full stars in my book.
Otherwise I love wearing these glasses, they don't make everybody just dark, they add a nice contrast that makes it easier to see everything while driving. It also helps kill any random glares from shiny objects too, so I'm always wearing these when driving.