Great product! I used it in my sprint/autumn trip from paradise to camp muir @ mt. rainer, it worked wonderfully. Light weight and good traction when crampon is overkill.
Kept it on my STI all winter, carried snowboard >30 times.
It get the job done, and the price is reasonable. There're wind noise but I don't care that much.
I wish they made it easier to adjust and take-off (like just unscrew one not two screws), thus minus one star. But once you put it on, it's solid.
I use this for both mountain biking and snowboarding. The D3O offers great protection -and they're good cold isolation too and I love that when I'm on my knees putting when the bindings on etc., they do tend to fall off a little bit thru the day and I have to adjust their position 2 or 3 times a day thus 4 stars. But they're the best I've found so far so I recommend those.
Better design than Flow's. The lift relief not only help while you're on the lift, but also helps getting in easier and buckle tighter than Flow's. Highly recommend!