most windshields can have a tint strip of 4-6 inches across top. It does help some particularly van windshields which are fairly large. the cab windows can be tinted just not limo dark. The problem I have with limo dark 9is I cant see at night thru them (son has it). We have tinted all vehicles and it does last but as noted above if the job is not done well they may start to bubble and the tint will fade if its cheap stuff. Look around and get recommendations from some who have had them done and go there, just watch out for low prices as that is the biggest problem.