Had 20% put on the front windows and it matches precisely what Ford put on the rear windows on the Maverick plus a 5% windshield eye-brow tint. In my mind (a scary place) it does reduce cabin heat . We had a string of 100° days this summer a couple of times. When I go out running around on errands getting back in after a half hour is not horrible, plus the A/C cools the cabin very quickly using only 5 out of the 7 fan speeds. Have not used the MAX A/C setting because its never been needed. When driving around sunset the tint makes sunsets real pretty on the side windows.
When I had the 2018 F-150 the tinting I had done worked great. Especially the tint on the rear window of the regular cab. It was 35% and even did a decent job across the great southwest trip in the middle of summer of 2019. .