I will admit, I was a little hesitant to buy this doggie door initially. I have always had pets, but they were outside dogs. So, letting them in and out was never an issue. We planned to put the doggie door on a 3-season porch and when I saw the picture of the brown screen porch with this dog door in it, I knew that was the one. I called and spoke to someone, who was very helpful, and he helped me get the right size for my Beagle and place the order. So far i love the doggie door and Max loves it so much he doesn't even slow down when he goes through.