From a technical stantpoint these rock! I have a light and dark lens for day and night skiing. It takes 15 seconds to change the lens.
They dont fog because of the adjustable vent on the top of the lens.
Good optics no distortion
Best part is Smith's customer service: Got right into a real person, and they sent me small parts for the goggles that i needed (i lost them 100% my fault) with no problem!
Couldn't be happier with Smith as a company!!!