Red Pig Bankwrote a review of Smith I/O Interchangeable Optics Spherical Series Goggles on November 9, 2009
I originally purchased the Regulator model from Smith. They are a good goggle but wasn't right for my face. I went back to the shop and tried on just about every goggle out. The I/O's were by far the best fit. While the goggle has a bit of sticker shock associated with it, you get a lot with the goggle like an extra lens, soft bag, and hard case. So the price isn't as bad as it looks. Initially, I wasn't sure about the Sensor lens, but I have found more use for that lens over the Ignitor. The sensor lets in enough light for night riding and provides a bit better depth perception on overcast/weather days. Pair this goggle with a Smith helmet like the Hustle or Holt and obtain the ultimate goggle/helmet interface. Caution you may need to purchase Smith's Helmet Strap extension to get the strap to fit a larger helmet.