Have only had the chance to wear them once, but can say that I did find them to be very helpful with glare from headlights and other bright lights when driving at night.  They lessen the affect enough to make a noticeable difference in driving comfort.  Since I wear regular glasses all  the time, I was a bit worried about how they would fit on top of those I wear for vision.  Well, the fit could be better, but they stay on and don't slide down too far on the nose to make them uncomfortable.  That is the only thing keeping me from giving them a five rating.