I have used these at the shelters adoption center. They are easy to set up and sometimes turn over when you have to many dogs in them.

Pros: portable,

Cons: easy to turnover

Th only way to house litters of puppies. They have each other, and room to play, and are so much better seen by people coming to the shelter. Such an important, good item. Real good at adoptathons.

Pros: playroom, they stay together, easy to move

Cons: no

I love these, when we needed one we borrowed one like this and it was great.

Pros: nice, durable

Cons: none

this is ok if you want to let them move a little more than a crate

Pros: decent idea

Cons: not great

can be knocked over when a dog jumps on it, only for small dogs

Pros: little puppies can exercize

Cons: falls over