I received this tree today. Was fairly simple to put together. It came with instructions. Unfortunately, the moment my cat climbed onto the top tier that sits on the house, it caved. The staples that held it came loose. She is not a large cat. So now the top sits crooked and does not have the reinforcement it needs to hold it up sturdy. As much as I paid for this, I would expect nails or something stronger to hold it together. I guess I will b looking for something to use as reinforcement for the top. 

Cons: House is put together with staples and not strong enough to hold top tier.