Small footprint, easy for cats to get from one level to another--great for watching out windows without having to attach a window perch.  It's well constructed and sturdy if it's against a wall--a little wobbly if a cat jumps from floor to top and it's not against a wall.  The top looks a little small, but our Maine Coon mix loves it and he's a BIG boy. I can't tell you how many kitty perches of one kind or another we've purchased that we ended up giving away because they took up too much room or the cats just wouldn't use them.  We're sold.  We might even buy another one..