Since there are 2 lenses, I have to rate this product a 3... 4 for darker lens (hopefully it stays that way) and 1 for mirrored &#34;titanium&#34; lens. The latter lens lost it's reflective film while putting the lens on my Half Jacket frames. I used the provided cloth to touch the lens throughout the installation but when I got the it on, there was what I thought was a smudge. Nope, no more reflective lens. :(