Very easy to set up. I currently have 2 cats, the younger, active one nearly lives on this thing=he loves it. My other, older cat doesn't show much interest in it at this time but he's not big on playing with much (and he's kind of scared of heights), he's a big lazy butt. Could be slightly more sturdy, but for price I have zero complaints. Keep in mind this thing is tall, the top tier is just a few inches shy of the ceiling in room I put it in.