My kitties and I both absolutely just LOVE this product and the price was amazing! 

However, there are two small issues with the unit. First, while the little greenery looks great on the unit, it was destroyed by the kitties within about 10 minutes. It breaks down into small pieces which, if eaten, would cause harm. I would recommend NOT putting it on the unit for safety concerns. Secondly, the left most tall pole really needs an additional support near the top. As kitties would play on the unit and jump on the top left pole, it would lean away from the unit. I ended up putting a makeshift bracket near the top and attaching it to the middle top floor. That gave it the extra support that it needed.