The apartment has an amazing view and a wonderful deck overlooking the city. It is also very comfortable and had everything I needed. The kitchen, in particular, was very well stocked. I love the location, with a great little park nearby. Everything was in walking distance, but the neighborhood was also very tranquil. Diogo and Joana's son met me at the apartment and was friendly and welcoming. They were responsive and helpful throughout my stay. The apartment was also very clean, and as I stayed for two weeks they provided an interim cleaning which was much appreciated. The internet was fine; it functioned for what I needed.
As a few others have pointed out, the sleeping area is next to an elevator bank. It vibrates and is loud. I would consider if this is the kind of thing you are sensitive to. If not, this is a perfect apartment.