A skunk took up residence under my front porch. Ugh! I did not want to pay the exorbitant pest removal fee and I did not want to trap the thing for fear of getting sprayed so I decided to try this approach. I installed the one way door and made sure the rest of the porch perimeter was sealed well. The first night the skunk exited and could not get back in. I could see it kept trying to dig in other areas but could not get in. Problem solved! Good, effective product.