Bought this a year ago for my three adult cats. 7kg, 6kg and 5kg. It is sturdy, the height is ok for us, but nests and scratching posts are for smaller cats for sure. I should know better. My 5kg cat smallest in the house loved it from the beginning. You have to check for loose parts after a while. Today after a year of use the center scratch post screw broke off. That highest piece wasn't sturdy at all from the start.