The "puppy outlet" is used by my adult Yorkshire Terrier as a sleeping place. He has in there really, really a lot of space - it would loose fit in even 5 puppies! :) At first I was a bit skeptical because my Yorki like noticeable with scratching and shoving on the reserve / grid if he has to get out at night. However, all doubts were dispelled! The playpen not work together, it does not fall to - nothing! Price / performance: outstanding! It is well made, looks great and is reasonably priced. That you can fold it and that is still the same even a bag to take away with this, of course, is also a plus! Thumbs up!