Ultra violet rays do damage to the interior especially leather. To preserve the interior you should dress the panels with protectant and the leather seats and panels should be condition but tints help the most filtering the rays from getting through.I will be looking for a skirt package for the MKZ most likely end up with oem ones. Tints is a must for me I can;t stand getting in to a hot car especially with black leather seats.
I'll just deal with the consequences when they happen I am looking to get 20% tints all around and maybe 15% just for the back window.The problem is that there are laws involved in most states that require your front two windows to be a certain percent or more so for them to be able to see inside the cabin. You can take the risk of having them all the same where I agree they would look better but is it worth the hassle?