I was approached by a mobile window tint installer that offered a film for the windshield. He had it on his windshield to demo the product. I don't think that it was tint because it wasn't any darker. Somehow it was easier on my eyes (I think he said that it reduced glare / UV. Supposedly it helps with interior heat build-up too. I think that he said it would cost around $300. Has anyone heard of this product? Is it worth the $$$?