I am considering tint for my (about to be) 2016 Advance. Is it enough to just tint the front doors, or would there be a benefit to tinting all side windows and moon roof? In Arizona, primary concern is heat. I don't want darker. I think the privacy glass in the back is dark enough, but I don't know if it blocks IR heat or not. One dealer tints 'em all, and another dealer just tints two front doors.