"I recently bought the Kitty Tunnel Tower after reading several reviews. I have two large tabbies and they had broke their small scratching post, so I wanted to get them something new. They played with this right away. I got it also because everyone said it was big enough for large cats. My cat Max is 17 pounds and his brother Jazpur is 16. Jazpur fits more comfortably on the top platform than Max, though they both lay on it. Max just hangs off a little. Jazpur is the only one of them that can actually sit in the tunnel and he is just barely able to turn around when inside it. Max only jumps through it on occassion. It is very sturdy and even with their size, it doesn't wobble when they jump on it."