The house is nice and cozy, but the arrangement of the kitchen and toilet is a bit different than I was expecting: Ricardo explained me that in the traditional old houses of Lisbon the bathroom was only on the ground floor so (since the apartment is on the top floor) they had to build a small one connected to the kitchen. So the apartment is good for one person or for 2 people not afraid of lack of privacy :)
Also, the location is amazing, right in the middle of Barrio Alto, very close to the 28 tram and the metro stop Baixa-Chiado.