I stayed at the Ricardo's apartment at the last week of December. The apartment turned out even bigger than it was depicted on the photos. The apartment has good furniture, very big kitchen that was very convenient for me to cook something and very good wi-fi. After arriving I got detailed information about the apartment and the interesting places of Lissabon. The location of the apartment was more or less good, but sometimes I spend a lot of time to reach the city center because all buses and trams went not frequent (especially early morning and late evening) and were overcrowded.
I recommend this apartment for all people, but there is one moment: the main room has very big windows and hence, bad thermal insulation. For summer it is not a problem, but in the end of December I spent two days to heat the room up to comfortable temperature.