I spent WEEKS trying to find a cat condo that was as sturdy as they used to be.  (The piece of junk I ordered from New Cat Condos a few weeks ago tipped over and fell onto the floor when my petite cats jumped on it.)  This thing would need a wrecking ball to knock it over.  And it's very spacious.  Lots of room for the cats to stretch out, and would be great for large cats. Unless something goes wrong, I plan to order another one for a different room.  If you have stairs or steps, you will need help getting it up, because it is heavy; that just means it's sturdy and well-made.  And it's fully assembled, which is even better!