I love this ex-pen. It's lightweight and easy to setup and put away. It doesn't take up much space when folded. The doorway has a raised part that my Dachshunds would have to jump over to get in and out, so I flip the pen upside down so that they can just walk in. The only downside is when using it indoors, since it's lightweight, my dogs can push it and drag it around the house, but they haven't been able to get out. It may be necessary to secure it with furniture or something.