Like the concept and the design. Photochromic lenses and polarized lenses are a must, and in my opinion have far more utility than the yellow, clear, or even the very dark tint. As much as I like the, I have to be honest to say the color are simply hideous at best!!! I know it sounds trivial for something that is simply design for a safety feature, but it is the reality that I ahve to wear that thing in my head for hours. I am a fashionista!!