Pretty good! Easy to put together without help. As other people said it's a little bit wobbly - Maybe wouldn't  work for big cats or multiples, but for one it's ok. 

EDIT: this fell apart after a few months. It literally snapped in half. Could have hurt my cat. DO NOT BUY. It couldn't even support my 8lb cat. We were both very bummed when it broke because she loved it.