I have 2 larger cats who both use this condo.  One is a recently adopted stray and is relatively new to scratching posts; he hasn't quite figured it out yet.  Our other cat took to it right away.  It seems pretty sturdy.  We have another condo by this manufacturer that also has sisal posts and fake fur and it's held up very well to continual use and abuse.  Neither of our cats seem to fond of the hammock so it's being used as a toy box for now.