I bought this for my one, yes one cat. He seems to get bored really easily and that turns into him climbing on things and knocking very breakable things over. He is still getting the hang of it's massive size and different levels but seems to be getting there. It came in a box that was heavy but manageable and when I got everything out, it tooke about 20 minutes to put together. It was simple and the instructions were very easily understood. The only thing I needed that was not included were a pair of scissors to open the box! So happy that I ordered from Wayfair and will be recommending it to friends and family!