Our family stayed here for 10 days. We were 3 adults and two small children ages (1 and 4). We could not have had a more perfect stay (OK, there was a taxi strike, but aside from that :) )
Catherine and Luis were helpful hosts. The place is delightful and, for a family with kids, the location across from Jardim Estrela is absolutely ideal. Any time the kids grew tired of the Aquarium, the Zoo, the castles etc. the park was always there. It has a wonderful play area designed with little kids in mind, beautiful grounds and feels very safe.
The neighborhood as a whole is quite convenient with bakeries, produce stores and grocery stores all a short walk away.
The apartment is spacious and very nicely laid out. We found the little garden area very convenient. The kids loved playing there.
Highly​ recommended as your home base for exploring Lisbon and surrounds.