It stuck perfectly, very easily and has remained stuck for 11 months. It is a bit small in size compared to others I see, but I have a small car with a small rear window, so it doesn't matter. I think other drivers see it just fine.

The sticker was exactly as described. The placement instructions were accurate and the installation was easy.

Satisfactory size and quite distinct, due to its intense red color. It is easily placed.

Quite noticeable signal, for the following reasons:
1. It is placed outside (rear) windshield.
2. It is bright, vibrant red and not dark red or burgundy.
3. Correct size (neither too big nor too small).

Another major advantage is its easy installation and strong adhesive ability.

The only (very minor) negative I can find is that it creates some "bubbles" during installation, but nothing significant.

5/5 from me.