Just got this and it took all of 5 seconds to unfold and pop up. I got the medium size and it comes in a cool carrying case that can fit in an average size checked suitcase if you plan on traveling with your pup which I do. Feels very durable and I love that it has a zip-on bottom and mesh top. Also, an elastic band on the outside and small reinforced hole for a water bottle drip. (Think guinea pig watering bottle system.) Love it!