Our cat Cleo is a big girl. I spent a lot of time trying to find a tower that she would fit in and on. I was very pleased to discover not only did she fit on all levels but she could easily access them. Its not too bulky and with a little elbow power is nice and secure. The cat toy is dangling in an odd place but othe than that i love it and even more love that Cleo loves it. Great purchase.