My kitties LOVE the Kittywalk!  Being totally indoors since their rescue from the Animal Shelter, they have really enjoyed being in the "great outdoors."  Right now, I have it rigged up to where they can go from house to the walk and can only allow them out when the weather is the "perfect" temp outside.  Will soon receive a pet door for my sliding glass door and work out another "rigging" to keep them safe, but able to enjoy the walk anytime they want.