2 one year old cats and they love it!  One is feral and loves to climb and the lazy cat loves to cuddle in the box.  

ONLY reason its not 5 stars is the round spindles are a little wobbly, and cant tighten any more.

Pros: Cost was amazing!  For the level of QUALITY!
Cons: a little wobbly, and the strings are very thin and cats chewed off in less than 10 minutes.