My puppies do well in this playpen for about 45 min at a time, then my ambitious lab puppy tries to jump the 40” height. She can’t do it yet (only 11 weeks and 18 pounds), but she will be jumping it before too long. The gate works well for getting in and out, and it keeps them in (two Lab puppies). They play and sleep in it. The gauge of the metal is not as sturdy as I would like, and I don’t believe it’s 8’ diameter as was advertised; it’s more like 6.5’.