The only complaint that I have about this cat tree is that one of the bolts, which is supposed to have two threaded sides, had one side which was not threaded.  This caused a slight inconvenience in assembly.  I was lucky that my local hardware store had something that was not quite the same, but still worked.  If not, there was no Phone number on my one page instructions to call, which would have caused mass irritation.  

My cats love it.  The smaller one was climbing on it before it was even finished.