I put together the Cat Tree yesterday. I'm not a DIYer, but the instructions were good, each piece was well marked and described, and it took me about an hour. While putting it together, my cats, 4 years old sisters, were very curious. Once I got it together, Daisy Mae jumped to the 2nd level, tried to grab the cushion in the box, and scratched one of the poles. Day 2, she got up to the top bed and took a nap. It's not too easy for an adult cat to get to the top level given how little room there is to plan a jump, but Daisy Mae is an excellent jumper. Tiger Lily hasn't tried yet. They are fans of the completely covered in material cat trees, so I wasn't sure how they would take to this one, but I'm happy with their response and this product is more aesthetically pleasing to me.