It works ok as a pet door. If you had a very slow feeble dog it might last longer. Any wind over ~10mph will hold the door open as the magnetic latch will not reliably catch after a pet goes through.I have purchased three, the last one of these doors just gave up, after about 10 months use by our four dogs. The first one that we purchased was several (about 7 years) ago. It lasted nearly five years with continuous heavy use by three very active terriers. The hinge pivots finally wore out and let the door jam against the frame. I noticed that the replacement (same staywell model) was much lighter and of different design. The new design lasts about 6 to 10 months. If this was a $15 product, this would be acceptable, at $40 to $50 it is not.Find different manufacturer.