Thus was very easy to assemble.  My 2 cats instantly began playing on it after it was put together. I like the quality of the mansion. I'm not sure how to attach the ivy so that's not on it yet.  Every day, I put all the cat toys inside the boxed in area and when I get home, they are spread all over the house. It's very funny. Some reviews state the cats beds are small which I agree, but the cats don't seem to mind and I wonder if they like them smaller since they are always laying in them. It probably keeps them warmer. :)