I bought this item for my two ferrets. There is a lot of room for them and they easily navigate the levels. Only drawbacks are: 1: The ladder angle seems a bit steep for my guys, however the ladders are well constructed and not slippery. Not the typical solid plastic, which act more like slides than ladders. that being said, 2: They usually avoid the ladder on the bottom floor and jump straight down from the shelf. The edge of the shelf has a small groove where they can get their little toes caught. Twice I've come into their room because of screaming only to realize the little guy had his toe caught in the groove and was hanging upside down from his toe. No damage seems to have been done, but I wrapped the edge with fabric so he can't get his toes caught anymore. The shelves could be improved to prevent this from happening. Otherwise, VERY high quality construction, very easy to wheel around and vacuum all the stuff they throw out. Easy to clean coated metal: just roll outside and scrub, and quickly wash down with the hose. My boys love it, they don't waste any time trying to escape because it's impossible with the locking doors.