I researched these glasses for a while...still, they are pretty pricey so I was hesitant to pull the trigger. Finally got these last week, and all I can say is they absolutely live up to the hype. Its hard to accurately describe the clarity of the SR91 lens. These truly are the most optically sharp shades I have ever worn. Got the C12 medium lens...colors are vibrant and really add to depth perception. Glare reduction is incredible with the polarized lens and doesn't come with that "rainbow" effect that happens with lesser polarized lenses. The frames are comfortable and really fit perfectly. Highly recommend these!