i just have it installed last Friday and have availed of the clearest tint which is huper optik 70 so far so good and installation process was quite unique, it was installed in an air-conditioned area, installers likewise put protective covers on all seats and steering wheels to prevent it from dirt and most of all their was quality control wherein if the tint doesn't pass their quality they have it removed and have it re-installed with a new one.
As to my experience when exposed to sunlight let me post again sometime next week so i can share it with you all thanks.