Our two-year-old ten pound cat spent a week sizing up this new arrival before enthusiastically enjoying its many features.  He favours the top perch, where he has the broadest view of the furry and feathered creatures frolicking in the back yard.  Although the tower shakes a little when he jumps and climbs, the structure is sturdy enough to withstand his shenanigans.  It took my two teenage boys under half an hour to complete the assembly, as they found the instructions clear and easy to follow.  The perches are roomy enough for comfortable lounging and napping, and there is sufficient space around the posts for vigorous scratching.  Awesome product for the affordable price!