I have had mirrorred shields, dark smoke, light smoke, and of course clear. I have very light sensitive eyes and I've found the best combination (for the street) to be my clear shields with my normal polarized sunglasses. The trick is in finding a pair that fit under your helmet. When I raced karts I used the mirror shield because it was "cool." But it stops being cool as soon as a little track debris gets up there and ruins the finish. I quickly changed to dark smoke for those applications.