This cat tree is well constructed and sturdy. I wish the box at the top was a bit bigger for my larger cats. I'm giving it a 4 instead of five because the circular platform was drilled in the center, instead the side as the photo shows and it makes it tough for my cats to use the large middle platform. I actually changed the orientation of the posts a bit to make it fit better in the corner I had for it, so that was a big plus. My cats are getting used to it. The one I primarily purchased it for isn't as enthusiastic about it as her carpeted, previous tree, but it is growing on her and all of them. I put a blanket on the highest platform and one cat sleeps there constantly. So, it is working well for us.