I've seen a few threads recently about the best cat tree and I'm tempted but DH says it's a waste of space and money and BiteyCat will probably just ignore it. If he was indoor-only I'd definitely get one, but he has free access to outdoors via a cat flap (though isn't going out much at the moment - who can blame him, it's chilly!) plus access inside to a very high bunk bed and a variety of window ledges, and makes full use of them. He also has loads of toys (though seems only to play with them with us - not sure if he's just humouring us or if he's not sure what to do with them without a human at the other end.) So do any of you with indoor/outdoor cats have cat trees and are they worth it?