As a ferret owner it's pretty ideal to have a cage with multi levels. There is the problem of keeping the cage REALLY clean since they will poop on EVERY level and the more crafty ones can push the door open if it's not in some form or fashion 'locked' with a clip or something else.
Especially ideal for mutliple ferrets which are most ferret owners! <3

Pros: Enough room for small critters to roam

Cons: They poop all over the cage and on the wires, have to be c areful when closing to have it 'locked' not just closed.

This is was great for my hedgehogs. It gave them many levels and increased their quality of life. They where able to make beds on each level. Only thing is they also went to the bathroom on each level so clean up is a little daunting. Also, it's hard to transport if you have to move it. Taking it down and putting it together warps the screws so it's best left where it will stay. We got ours from someone else and it barely fit in the back seat but it's worth it!

Pros: Big, Spacious, and Fun

Cons: Very large and hard to transport

ferrets love to climb these ramps to explore the next level

Pros: roomy

Cons: n/a