Love this pen, it's the best. Easy to assemble, colorful, has a nice open feel so our baby isn't in prison and cut off from the family activity. BUT BE WARNED this playpen has a design flaw that creates a choking hazzard. The play panel has some busy gears and a button baby can push to squeak. This button can be easily pulled off by baby and will be in two small parts, the button and the plastic squeaker. Both parts are small enough to cause a choking hazzard, our 11mo had the whole button cap in her mouth. So before you think about turning your back on your baby in this pen for a second, I'd recommend removing these parts yourself. Great play pen in every other way.
Had no clue about this policy with Delta. The fine print isn’t exactly clear, so I’m guessing your miles may vary depending on your gate agent and airport. I am going to have to investigate the other airlines (somehow I’m guessing they aren’t as generous). Of course – don’t forget Southwest’s 2 free bags that make this all a non-issue if you choose to fly Southwest.