We had recently moved and no longer had a fenced in yard, for our yorkee to use for some fresh air. Every pen that I looked at was pricey and they were only 2 feet in length. When I found this one, it was 6 ft. And less expensive than the other ones. And it works perfect for him. My husband says he's gonna take it camping with us also, since its so mobile.  

Pros: size and price
Cons: no cons