I love this product. I got it because my neighbor was smoking right outside my front door and I couldn't stand the smoke smell when I came home from work. I am so happy that this door guard stopped the smoke smell. It was not hard to install. My door was slightly difficult to close the first time I put it down, but after the third close, the door closed fine.
This product is simple to install and it works perfectly! I purchased this to cover a 1-1/4 inch gap under a door at the rear of the garage which exits to the back yard. Very happy with this product!