I am scheduled to have my window tint put on my car in the morning. Thank you for all of your inputs. I have not read anything in this thread to discourage me from having it done. It is being done by a shop in here in town that has been in business for over 30 years, they have installed on Porsches before and offer the type of film that my dealer recommended--formula one. I have had a previous car's windows tinted before but I am finding that I am giving things a lot more thought when it comes to the P-car than i did my Nissan. Thanks again!