While I like the looks of tinted windows, it makes it darn near impossible to see out of after dusk and the internal reflection/glare compounds the problem even more. In a car where visibility is already limited, it just isn't practical for some of us. And the glass already has UV protection incorporated though admittedly not as much as with the tint. For the above reasons, it makes your comment arguable as to whether it is worth it or not. For me, it is not worth it.