I love these shades. They're super light, have interchangeable lenses, fit my big head, and are comfortable. I bought the ones with matte black frames and gold mirror lenses. The Smith website describes the lenses as a brown tint, but they are definitely not brown. They are a neutral gray tint. I still like them, though.
In my opinion, they're kind of dorky looking. Fortunately I can't see them while wearing them, so I wear them all the time.