My horror story with Photosync:
I had mine done by one installer in my area and he could never get the front windshield right. The end result was eventual squiggly lines and blemishing. Neither the installer nor his Prestige contact could explain it. Removal of the film always left behind some adhesive residue and the installer eventually scratched the glass while replacing the film. Never again! After the 4th time, I gave up on this installer and decided to email Premier about it. Reasons for the issues were Tesla's highly curved glass requiring more heat than normal to shrink it to the glass. Poor application of the heat probably resulted in the deformation (squiggly lines). So I drove down to Prestige to get it done right where the they pointed out other flaws from my local installer's application. <sigh>
After Premier installed the front windshield, the squiggly images did come back, but were light and not as bad as the local installer's multiple tries and only occurred around the corners. It could only be noticed at night when the light hits the film at the correct angle. It was acceptable and I didn't notice it too much. However, the heat rejection is incredible on this film, so I'll be coming back to this film again.
It is definitely worth it to have an experienced Photosync installer do the work. And if they've done a large number of Model S's, even better. So Premier, I'll be calling you guys again when I pick up my P90DL this month. I'm going to get it done right this time.