To be brutally honest, I don't like them one bit - especially in vehicles approaching me from the other direction. IMHO they are inconsiderate and blinding to oncoming traffic. While the brighter light probably means somewhat safer driving for those using them, I feel it gives a false sense of security, and may contribute to overdriving your vehicles' ability (and your own) to stop or slow down when a hazard presents itself. Deer, Elk, Buffalo, Elephants can jump out a few feet in front of you; not necessarily 1/2 mile down the road. I also feel the harsh blueish-white light would increase eye and overall driver fatigue on those long night trips. I also believe many manufacturers have stopped putting them in their new vehicles for these and possibly other reasons. They may be legal, but that doesn't make them user-friendly. They're not for me.