Should I apply the car film myself or have it done at the 4S shop?

[OStella]

First, check the quality of the film by feeling its thickness. Generally, very thick films are of lower quality and cheaper. Also, see if you can see outside from inside the car after the film is applied. If you can, it's a good film. After evaluation, if the film is of good quality, it can be accepted. Summary: For free films offered by 4S shops, assess the quality of the film and confirm whether it includes the front windshield. If the film is of poor quality or doesn't cover the front windshield, you can choose to apply it yourself later. Additional Information: Quality inspection of car films: Check if there are any dust particles or bubbles in the entire heat-insulating film. Ensure the edges are firmly adhered. Edges are most prone to dust accumulation and test the technician's attention to detail.