i've had very good experience with huper optik many many year back, when they HQ was at Jln Othman, PJ; so much so I had 3 cars tinted by them. Still have a car with me that had been tinted for 7 years without any problem even with winding up & down daily for touch & go for that many years.

But i cannot vouch for them any longer, at least at their PJ installer (the other one is at Pandan Indah); they rushed through and their finishing isn't at par anymore. I even had to remind them for missing screw and what-nots. This is for the 4th & 5th car. So much for customer loyalty :-(