This cage is the best cage money can buy for a ferret or other small animal. My favorite feature is the double doors on the front. Most other cages have only a small door that takes up only a fraction of the front side, making it nearly impossible to reach in and clean the cage without having to take it completely apart. The dual-opening doors make it quick and easy to take out the bottom tray and wipe everything down. Also, the modular nature is a huge plus. I bought this lower portion first, and was then able to purchase the add-on unit later on when I got new furry additions, without having to purchase an entirely new cage. The black hammertone finish is attractive and looks nice sitting in a room, unlike the multicolored plastic cages you see at the pet store. Being entirely made of metal, this cage will last a lifetime, and is well worth the investment.