These glasses are fantastic. The lenses are clear, without any distortion at the edges, the coloring is uniform without any variation, they don't slid off my nose at inopportune times, and the tinting is dark enough in the bright Arizona sun.
My favorite feature is how light they are. These are replacing an old pair of Ray-Bans, and the difference is (pun intended) night and day. I never forgot when I was wearing the Ray-Bans, these are so light, and so comfortable, that I've worn them in the house a few times.