Yup, the film and the install make all the difference. The guy that did my 944 did a hack job and I'm going to have to peel it off. I'm not happy...
The best tint I have ever seen was done by a friend of my dads. He was OCD about getting the window perfectly clean. Sadly, he was killed when a driver crossed the centerline and hit him head on about 2 months before we got the 944...