Sunglasses will fit everyone different, but the Precept was the exact fit I was looking for. I have a bit of a narrower face with deep set eyes, and they fit perfectly.
The Polarchromic lenses seem to have improved compared to my older Smith Escapade Polarchromic lenses. They are much clearer in low light; really giving definition/contrast in shaded areas. Perfect for mountain biking and not having to take them off when you get into shaded parts of the trail.
I haven't had to use it on these yet, but I continue to support Smith because of the awesome customer service. They truly stand behind every product they make, and they do everything they can to make sure you are satisfied.