We also no problems with the processing or the mounting, we got the two towers now set for about 1 year.
Every now and then, of course, the cushion cover to clean the cat hair, but that's clear.
Our cats are sometimes also a bit heavier, but really not a problem. Of course, the towers could still be built, ideally a little more robust, but for example, are with us sometimes two adult, really bigger cats together on the top floor or snuggling else in pairs in one of the lower compartments.
Would I buy again at any time.