Nice place. Clean, comfortable for 8 people, very well located in Barrio Alto. Luisa and her sister are very fiendly and we didn't have any problem. They gave us some fresh fruit when we arrived.
The only thing you have to know is that there is no elevator and it's the 4th floor. On the other hand the views are really nice from de balcony.
To summarize, very nice place, friendly people, clean and well located so I recomend it to spend your stay in Lisbon. :-)