Used vkool on 2 cars but with different results.

First one got tinted for RM1500 at M1 damansara for my e36 bmw 328 five years ago. Wasted my money. Yes, light can go through but it didn't seem to prevent nor dissipate heat quickly enough. When parked under hot sun for 30 minutes, need at least 8-10 minutes of full blast aircon to bring heat under control.

Then bought a e46 325, with vkool - negotiated with salesman from AB segambut - for RM1000 nia. Much much better.

Felt cheated by M1. Gave me fakes one? But I do have a cert for JPJ check wor.