We have a variety of sizes in our cat family, from a 7.5 lb. girl to a couple of 12 lb. young Maine Coons who are still growing. They all love this cat tree. It was not difficult to assemble, even with all the cats "helping". Everyone loves it, it looks really good, and is quite sturdy. My 12 lb'r races up to the top berth on a regular basis, often accidentally sitting on someone who was already up there. Even when that happens, which means a scuffle and someone has to move, this piece of furniture is totally stable, there is never even a chance it could tip due to the way it has been designed. The fleece has been easy to clean so far, it is soft, and the cats love that part. One of the biggest hits has been the ladder, it is great fun to shove a toy through and then throw your body through the rungs of the ladder to attack the toy. This item is three times the size of our other cat trees, and it only cost about $25 more than the much smaller ones we have. Well worth the money, I highly recommend this item.