Gonçalo was a perfect host; the apartment was as we expected and he replied immediately to our question. Also the position of the apartment is perfect infact is very near to the city center and to the subway station Baixa-Chiado.
If you plan to visit the city during the winter beware the fact that the apartment has not heating but just some eletric heaters on the other hand the temperatures in Lisbon are usually mild even in winter so it should not be a big problem.
I would definitely reccomed this as the place to stay when visiting Lisbon.