I had a wonderful stay in Miguel house; communication with Miguel was smart and easy; check-in with his fater was very friendly and he suggest us many things to do in Lisbon.
Apartment is big enough, very clean and you have whatever you want even to have a breakfast in the morning or eating at home; in the city center but in a very calm street; you're just behind the Bica Funicular; Barrio Alto, Cais do Sodre station, tram, bar restaurant are all walking distance.
Wi-fi work correctly.
Highly reccomended.