OK, so architecture & design mean ZIP to cats. Fit & function are their decision makers to either "keep" or "ignore." Fortunately for ALL of us (humans and felines) this tower received a GIANT 'PAWS UP' response from the first day we put it together. Even that was FUN & EASY for us 2-leggeds! A week ago, a new guest remarked on what an "interesting sculpture we had sitting in the corner of our living room." I had to laugh & admit, no, it's our cat's tree. Now that's what I call a breakthrough in design. Oh, and the practical feature of being able to REPLACE any carpet sections so simply? Brilliant! Have we had to do that yet? Nope,they're super sturdy & after 18 months, still look brand new (and yes, the cats DO use it daily). Love, love, love it!