"I suppose sunglasses costing this much could be viewed as a bit of an induldgance, however the financial blow is cushioned considerably by the discounted price here. I purchased my glasses for cycling/ triathlon events where the Radars have an established a reputation as the default glasses for people wanting top performing equipment. I carried out a lot of research before buying, my expectations were high and I havnt been disappointed. I've used them twice for cycling now, very early morning rides where misting up and dealing with emerging sunlight have been problematic with other equipment. No such issues here, the lenses simply deliver crystal clear, high contrast images, faultless really and eyestrain seems to have been completely eliminated. The optical quality is so good I've started using them for driving. A couple of additional factors that I wasn't aware of are that the frameless bottoms mean that you don't get frame creeping into view when cycling and glancing down and the arms seem very secure and fit nicely into the air vents on a cycle helmet when not in use. In summary. Delighted with the product, great people to deal with, Kate took my order, delivery was quick, and I was updated with despatch and order tracking details. I'm happy"