I guess I'll be the voice of dissent. I hated them! They got plenty dark when I was outside, which was fabulous. The car thing was a bit annoying, but liveable. However, mine took ages to lighten. Seriously, it took at least fifteen minutes for them to go back to clear. It drove me nuts. After talking with my optician, she seemed to think that it had something to do with the type of lenses I had and the other coatings I'd added, so it could have just been a fluke for me. But even so, I'll never get it again.