I had 8 yr. old film that they took off without damaging the rear window defroster lines, which can sometimes be damaged by the old glue on the old film. They took off old Madico purple film, and put on the new Crystalline 40. It has much better heat rejection, with a much better clarity to look through. Even though I rushed them to do the job in a short period of time, they did good job of installation. Only one very small (1/8th of an inch squared) piece of the rear window tint is missing, but it is in a very unnoticeable spot down by the trunk area, so I am pleased. I do suggest that you get a quote from them before you go elsewhere, as I found them to be much lower in price than another 3M dealer that I got a quote from.