I would compare the sleeping surface dimensions to PnP dimensions. Many parents fear their DC outgrowing the PnP b/c length/height b/c it means there will be a toddler too big for a containment device in a (likely) unbabyproofed environment. Not a good combination. We're at that point right now - where DS1 is too long to sleep in a PnP stretched out, but is nowhere near ready to sleep on an aerobed. Our trip next week will be interesting..