Like all Serengeti lens, the ones on these are outstanding.  No other sunglasses compare as far as clarity for driving.  The reason it only gets 3 stars is the frame is weird.  The nosepiece is extremely uncomfortable.  The DBL on this is relatively large but the way the nosepiece is contructed, you actually end up with a very narrow gap for the nose.  Maybe after awhile my nose will get used to have sunglasses sit so high up due to being too narrow and these will be ok.