It was easy to assemble and quick. It is very sturdy. The cat was a little shy in using it as she has never been up that high. After 3 days of showing her ways to get down safely she loves it. The only thing is she's not a good jumper so we still use her stool so she can get up to the condo easier.

Pros: quick, easy and sturdy. Like the condo cubbie to hide in.
Cons: Condo level a little high for a cat who doesn't like to jump.