My kitties love love love this cat tree! I had bought an identical tree about 4 or 5 years ago and it has been in constant use since, by a 7 lb female and a very wild 14 lb male. It is very sturdy and I have no concerns about the kids knocking it over. Over the course of the 5 years, the sisal rope was getting destroyed and was too far gone to repair. I could have ordered replacement parts however the cost of the posts was almost as much as a new tree so I splurged.  For the money, you can't beat it and a few years down the road, I will probably replace this on with a newer identical tree.  My only suggestion: I wish that this particular model came in a darker shade rather than cream.  Even though I regularly vacuum it, what once was cream was starting to look gray from all of the hairs.