I stayed with my family of five adults and two children under two. The apartment was very comfortable and met all of our needs. Having access to air conditioning and laundry was essential to our stay with the children.
While we were really happy with the space, amenities, and comfort of the apartment I might choose to stay in a different neighborhood with children next time. There is much street partying late into the night (although windows are very good at keeping out noise) and our upstairs neighbors had much late night partying as well. We were fine with all of this knowing we were located in a party-oriented section of the city but families looking for something quieter may not be as happy here.
João was extremely responsive to our needs and requests while we were there and made several suggestions on activities for our family.
We had a wonderful experience and the apartment made our stay in Lisbon wonderful.