ok here a review for this product and what i notice

-wind noise is greatly reduced but not eliminated when speeding (80% reduce)

-sound from a car passed by you is lower, no more vroom-vroom from fast car

-when raining noise become much more quieter

-car doors are harder to close but tin kosong feel when the door are slammed shut reduced

-easy diy, 20min can do whole car doors already

worth it to invest in this stuff