My 13 pound maltipoo fits perfectly in his stroller.  This stroller is very sturdy.  I wanted a stroller for my dog that would have a smooth ride because he has back issues.  This stroller has a very smooth ride and is easy to steer, even with one hand. Teddi has a great view of his surroundings when being strolled and I can also see what he is doing from a screened window on the top of the stroller.  He likes to look at me through the top window too.
It was easy to put together.  It is also easy to collapse when putting away for the day.  Really love my purchase of this stroller! 

Pros: Sturdy, smooth ride, easy to steer and operate, comfortable for pet and great openings for them to see out of, easy to put together 
Cons: None