Arrived one day earlier than expected. Very easy to assemble even with two large cats crawling on it. The smallest pole connecting with busy-box toy plastic broke when trying to screw into platform. Not a huge deal, just left the box on the corner. Have two large cats (20 lbs & 14 lbs), and they both jump and move easily on it. No fear of tipping. Good size to place next to a window, the top and first stair can be used to see outside. Good purchase, even with the small snafu.  

Pros: easy assemble, nice color, sturdy enough for large cats
Cons: plastic bottoms where it screws into platforms