This has to be the sturdiest cat tree I have ever seen! I have a 20 lb. Siberian Forest cat, she is super intelligent, playful, climber, jumper, and we needed a sturdy cat tree for her! This perfectly fits her lifestyle. We could not believe how detailed the instructions are, by the time we installed the 3rd layer, we knew we had made the right decision. All of the parts are labeled and is easy to construct. Very, Very Happy with this purchase!