At first, I was hesitant. Didn't think it would work. Boy was I wrong. After installation, when I put the last strip up, I could feel the cold stop coming in. It made a big difference. Now I can keep the door open and dogs can go in and out when they want to. Really easy to install. And this is between the Strom door, and the regular door. I mounted the track horizontally instead of vertically. It was the only way it would fit. And it worked. They stay in place.