This is a wonderful cat tree.  We have two cats, ranging from 10-12 lbs each, and they love to climb on it and chase eachother.  It can get a little wobbly on the upper levels, but we have it against a corner and it is okay.  They love playing with it and resting on it.  As other reviewers have said, the toys are not meant for play, our cats bit through the string in less than one day.  Other than that, they love it!