I'm impressed...  It was easy to assemble.  It mounts vertically which is important as I'm buying a second one to try to bridge a gap wider than a doorway.  At first, I didn't realized you needed to lift the gate door before turning it to open it (without moving the foot).  Once you know that, it's easy to do.  It doesn't seem like a cat can get through the slats or underneath.  Still TBD on whether it keeps the cats (including one tiny one dubbed Houdini) on the side of the gate each belongs on!