I saw this door on Instagram from a friend. I showed my husband and we purchased two! They were so easy to install and looks great in our upstairs. Our cats now have a safe place to go away from the dogs, and we can finally close the door to the litter box area. We just purchased our 3rd one, and added it to our daughters door. This way she can keep her door shut, but the cats can still come and snuggle with her at night. Would recommend this to anyone who has cats!