I've worn these goggles for four seasons now. Solid, affordable, easily interchangeable, and comfortable. My chief complaint is the ease with which they fog. A slushy day, powder spray, or a poorly placed mask cause them to fog readily, and very often between the layers of plastic. Relatively warm OR winters aren't the best for fog free riding, and I could understand this if the moisture didn't seep between the layers. Happens on all the lenses I have for these goggles. Maybe a bead of epoxy around the seam would do it. If you ride in sub freezing temps most season, I'd recommend these with a fair warning.

I thought I'd treat myself to some nice googles and I got these as soon as they came out. That was the last time the lenses weren't fogged up. Both the dark and clear lenses fog up as soon as the googles come in contact with my face. The fogging happens in between the lenses (due to a failed seal?).
My wife has the wm2 goggles and the same exact thing happens. We met another couple who also got them, and theirs also fog up! So either Anon sent a very faulty batch of goggles to NZ, or the design is incredibly poor.

These are the best goggles I've ever owned. The lens change is super fast, which makes the skiing experience more dynamic for changing conditions. I buy great gear that will last, and this product is a perfect example of quality.

Mine came with two lenses, and one of them had a bad coating issue. I was able to painlessly warranty them with Burton directly.

I also bought a clear lens separately. Maybe one of the smartest purchases I've ever made for optics. Highly recommend!