Another LOVE IT from me. Even when it is up you can turn it side ways and it will fit through doors. You can also smoosh it in and it will take up less room when not using it but not take it down all the way. It is true though that they can turn it on the side and use it like a hampster wheel. I have it upstairs in my sewing room right now and I left the room for a FEW moments. Angel had it out the door all the way to the top of the stairs
. Scared me to death. Now I put something in front of the door or close it if I have to step out.