This is a review of smith in general, and the turbo fan goggles in particular.
First - the goggles. The turbo works. You can wipe with de-fog cloth all you want, but the turbo works. If you wear glasses (look for the turbo OTG models), it is essential.
Now, for the company. I had an older model turbo where the foam broke down letting snow and water in. Smith REPLACED them - no question. I had to send in my old goggles, and they sent me an email saying they'll replace them. In a week, I got a brand new pair of TURBO Knowledge OTG. That's customer service! If they think they have a customer for life, they're RIGHT!