Review on Convenient 4-Way Locking LYNX Cat Door for Pets: Ideal for Interior & Exterior Doors by Beth Finlinson

Well not so good. It was easy to install and looks very nice. Cats have a problem with that. The transparent parasitic door is quite thick and heavy. You don't really understand how to push your head. Also, the hole isn't as big as a circle! Because of the way the door has to open, they have to squeeze through a smaller space. I have uploaded an image to make it easier to understand. Also, they seem to get pretty annoyed by the end that the see-through flap is kind of squeezing their tail. I hope it will get better. I can just take off the transparent door and leave a hole in the shape of a cat's head.