I have placed them since 23/12/2023 and so far they have not come off and have not suffered anything. I bought them for blind spots and not so much for parking. They are 360 degrees and give the possibility to turn them as desired depending on the car.

Very good, especially for parking, it helps a lot to avoid hitting the sidewalk. Personally, I don't have it to see the blind spot, I have it specifically turned for the wheels when parking.