We run a small animal rescue, and we grabbed this cage for our rats. AS we acquired more rats, we expanded this by adding a second level, and it has more than enough room (one you add in some tunnels and hammocks) for up to twelve rats, even though we usually keep less than this in the cages. They look nice, work really well, and aren't that hard to put together. This cage is definitely quality, and we really appreciate finding large, good-looking, durable cages; we go through a lot of cages with how many small animals we look after. Thanks!