The appartment is newly renovated. It's very comfortable, spacious (2 bedrooms), well-equipped and located near the tourist spots.
We stayed here for one week and had no problem at all. The view from the appartment is nice, on the left side you will see the monument "Cristo rei" and on the left side the "Palácio da Assembleia da República"
Transportation is not a problem because you have a bus stop just infront of the building, 5-minute walk going to the must-ride tram line 28 and 15-minute walk going to the metro Rato (north) or Cais sodre (south).
The host, Margarida is very kind and nice. She gave us a lot of useful information about the city ( transportation, restaurant, side trips...)
Overall it was a great stay. Lisbon is very beautiful and underrated. People are so helpful and very kind. One week is not enough because there's a lot of place to visit. You should just pay attention to pickpockets while you're outside.
I recommend this place.