Great product, clarity of lenses is top notch and they look cool. Performance on the bike is great and they're very comfortable. I'd bought cheaper glasses in the past and they either steam up when riding or get uncomfy-these don't. Not cheap, but you get what you pay for!
I bought this to attach to a monopod I'd recently bought, mainly so I could get the camera on and off quickly. The unit is nice and chunky and seems well made and there is not much to go wrong with it. Good value and I'd have not hesitation in recommending this.