Portability: Are you going to be taking your playpen to other houses? Perhaps you might want to spend a day at the park, where a playpen would be a handy way to keep your baby safe and let them play alone while you read a book? If you think you might be taking your playpen outside of the home, be sure to choose one that can fold up for easy transport.
Some models provide storage for toys and other baby items in zippered side pockets, fabric shelves, hook-on fabric storage pouches, and small clip-on parent-organizer bags. Of course those features aren't necessary, but if you want to use them, look for storage that is big enough to actually hold something. Storage compartments should attach, or be built into the outside of the play yard, so they're out of your baby's reach. One deluxe example is the S1 by Safety 1st Satellite Premier Playard - Pegasus (about $128), which comes with attached shelves and a small laundry hamper.
A division of Dorel Juvenile Products, Safety 1st entered the juvenile market in 1984 with its now classic and internationally recognized "Baby on Board" sign. Fueled by the immediate success of the sign, the company claimed a market niche in child safety and became the first brand to develop a comprehensive line of "childproofing" products. Available everywhere juvenile products are sold, and online.
It's helped us out tremendously. It provides a way for us to cordon off a safe space for our son while allowing him an area to freely move. The fact that it breaks apart and can be arranged in various patterns allowed us to expand that space with some creative use of furniture. Sadly though like all young raptors, he's testing the gates, looking for weaknesses that he'll eventually use to escape and terrorize the local populace of cats.