Very pleasant stay. The flat is neat, cozy and in a charming old building. The location is great and the center is at a walking distance. Also Francisco was anticipating our needs and very helpful. We appreciated the four flights of stairs that kept us moving after all lisbon's good food, the proximity of the shop, the metro, the car rental, the playground for the kids, the restaurants and bakeries. One unavoidable thing is the noise of the planes due to the proximity of the airport to the city. As another comment was saying, don't think about it twice, this is the place to stay.
Thanks Francisco