The cage is perfect for rats, huge, easy to clean, safe, and can be separated into two cages. This last feature is nice in case one rat gets I'll or hurt, you don't need another spare cage. I like the design of the cage very much with exception to the bottom trays. They are very shallow and will not hold most kinds of litter. Most people potty train their rats to go in a separate place if they have this cage, which know I will try to do so I don't have to purchase deeper trays. The cagewas very difficult to put together and a lot of the metal needed to be re-bent. I was expecting it do be hard, but not as difficult as it was. 

Pros: We'll thought out design, larger, easy to clean, safe, can be divided into two cages.
Cons: Shallow pans can be messy and difficult to assemble.