I have had a pair of the Stringer sunglasses with the blue mirror 580G sunglasses for three years. Overall I love them and actually ordered another pair with the silver mirror lens. When I received them I was disappointed to find out that the silver mirror lenses use an amber base lens as opposed to the gray lens used with the blue mirror lenses. I am now exchanging the silver mirror lenses for the same pair of stringer that I currently have with the blue mirror lens. The only complaint that I have about this particular pair is that after three years of abuse the rubber pads on the nose an ear pieces have started to chip away and fall off. I don't consider this to be a major problem considering the amount of abuse the have seen is probably much greater than typical. The lens are great and hardly show any signs of wear other than a couple of chips from dropping them on concrete repeatedly.