We took our nine month old and he loved it. We took a lot of breaks in the air conditioning when my older son and husband rode some rides. I am glad that we brought our own stroller. He was comforatble in it and he snoozed away during his naptime. You also need to realize that you can't go commando style. We were usually back in the resort by 7:00. Both my husband and I know that the trip was not for him and that he won't remember it. We have super cute pics that he can see and enjoy. As long as the baby is not miserable I can't see the harm in taking he or she to WDW!