I have a mainly indoor cat,about 4 years old,had her since she we took her in at about 4 - 5 months as a stray. I live in a second floor flat with a balcony that she does have access to,but I have always been reluctant to let her outdoors properly as she has no way of getting back into the block as there are security doors front and back. Also,when she has gone out a few times in the early days that we had her,she disappeared for hours,and one of us had to keep going down to the back door to see if she was waiting to come in,so not ideal. Plus we live near a busy road. I've considered getting one of these cat activity centres/trees for her. She seems contented enough but I sometimes feel a bit guilty about not letting her out and being able to run about much. The problem is,will she actually use it? I know realistically no one can give me a definitive answer,but what are your experiences of these with your cat/s? She is a bit fickle,changes her sleeping place every few weeks,and totally ignored the nice cat bed that we bought her 3 years ago. Ditto the scratching post. She DOES like sleeping in an elevated position though,never sleeps on the floor. Would I be wasting my time and money?