I don't get how you guys are able to put 5-20% over the factory tint and still be able to see out of it... especially at night time.
I have 20% on the front sides, factory in the rear and 40% on the windshield... this provides enough blockage to keep heat out, partially eliminate the need for sun glasses, and also keep people from seeing in without being too dark and I can see out at night with no issues.
Windshield tint is not for everybody and usually very illegal... however, in most cases it gives a more uniform look, soft of an optical illusion to bring attention away from the dark side windows. Usually more visible in vehicles with lighter colored dashboards like my truck. I had 20% on the sides and nothing on the windshield on my Grand cherokee... light colored dashboard... it brings a lot of attention to the side windows especially on the GC as its much smaller in size.