Great door, easy to install and progeam. It works perfectly* so far (a little over a month of use) and the chickens learned to go in before it closes pretty quickly. I like that it has battery back up for power outages and before I got my plug wired I was using battery only for nearly two weeks without the batteries dying, which is impressive! *I use it on timed open/close so I can't speak to how well the light sensitive setting works.