My cat LOVES this thing.  Like it's his favorite thing in the entire world!  He sits in it, scratches it, hangs out around it.  Probably within the first week the vertical part was almost worn down.  Here's where the 2 stars come in, you can replace the bottom cardboard but you can't replace the vertical piece!  Seriously?!?!  I don't care if my cat paid me back, I'm not spending this kind of $ on something that lasts 2 weeks.  It's absolutely ridiculous and needs to be redesigned.  You'd make way more money off of me if you sold refills and these could be swapped out.  SO disappointed, and so is Ziggy!!!