Our travel bed search ended with the Peapod.
The main reason we ended on this one is that it is lightweight, can be packed very small, and Castle is contained. We went for the bigger version in hopes that we can use it for longer and will be a fun shade shelter for the beach. We have access to a pack n' play but it's too heavy and bulky for air travel. Plus we would have had to pay for the extra piece of luggage.
Pros of the Peapod:
Virtually no set up, it's a pop up tent.
Can easily fit in a suitcase.
Can make the 'room' dark by closing the flaps and putting a light blanket over top of the tent, without worrying about blanket falling in.
Comes with it's own air mattress that fits inside a pocket at the bottom.
Somewhere familiar for baby to nap in different places. We take this to friend's and Castle recognizes his sleeping tent.
Cons of the Peapod:
Can be very stuffy in there in hot weather.
Can't use a bed sheet. (I tried. I wrapped a bed sheet around the mattress and put it inside the tent, as expected, I found Castle UNDER the mattress in the morning.)
If you have a super wiggler, it can flip over. One night Castle slept on the roof of the tent. But it's been many naps and many nights and it's only happened once.
Air mattress in this model not self inflatable. (Some of their other ones are.)
Despite the cons I'm very happy with it. It's great for travelling near and far. And I can see it being a fun play tent when Castle is older.