This tree lasted about 3 years before it finally became too much of an eyesore to keep in the living room. It was still pretty functional but the cats had ripped off a lot of the sisal on their "favorite" posts. I considered re-buying the same one but I have since moved to a smaller apartment and there isn't really room for a cat tree this large.  

I have medium-large sized cats (British Shorthairs) and the house was too small for them to use. One of the cats would use the top perch (he's about 12 pounds), although it really didn't look that comfortable. There were no stability issues with them jumping and scratching on it.