I've long wanted the *ultimate* cage for my rats - the kind that would last a long time, be easy to clean and move around, and one where I could attach 10,000 accessories for their enjoyment.  When I asked reputable rat rescues and other rat owners, only one answer came back.  I had previously been using a rabbit cage (bars too wide, had to clean from the top of the cage, limited options for design inside the cage), so I finally took the plunge.  My boys were so excited to see the new cage, they hardly knew where to go first!  They've settled in very nicely, and I especially enjoy the small hanging dips in the support for the inner level that allows me to hang extra things where otherwise there would simply be empty, unusable space.  The full double-doors are heaven-sent: I can actually sit on the floor while cleaning, instead of awkwardly stooping over to scoop and scrub.