easy to put together took about 15 minutes and so very nice, came out last night and my smaller cat was curled up in the top, I did not realize when i purchased this that the top cover can be removed and has a pillow around it for them to rest on...the rope & box on the bottom are already favorites..definitely recommend, we have one cat around 8 lbs and one around 16lbs..and this handles the weight wonderfully..she likes the top he likes the first platform down..they fit perfectly!! Highly recommend!!