This is a wonderful cage for my rats.  It is big and moves around easily because of the wheels.  There is a nice shelf on the bottom to store the food and other things (Toys, blankets, extra bedding, treats) that I have for them.  The only thing I would change is I would prefer if the bottom pan was a little deeper to prevent the ratties from throwing out their bedding and making a general mess outside.  Otherwise, the cage was fairly easy to put together, the pre-drilled holes all fit together nicely, and it feels nice and sturdy.  The finish of the cage is nice and I am glad I got it.

Pros: Size and the fact that it has wheels
Cons: The cage pan is a little shallow and the ratties throw out their bedding