I foster a lot, so sometimes need to keep kittens or cats contained. This is nice because you can choose the size you wish to build. However, I will caution you that you need to be carefull, especially with adult cats, as they can break out! Haha, the zip ties will hold, but of course, I wanted the flexibility of restructuring. So, I currently have it outside on my patio for my own adult cat to get safe outside time, but I keep an eye on him and check the connectors frequently to make sure he doSee full review