Mariana, her son and her flatmate are really chilled and cool hosts. Unfortunately, I didn't get to talk much to them because we had different day schedules and I had the flat to myself most of the time. However, I always felt warmly welcome and I can totally recommend their place. Incredibly central, so it would only take me 20 minutes by foot to see all the major sights, yet far away enough from the vibrant centre of Lisbon to have a good sleep. Room, kitchen and bathroom were very clean. The bed looks a bit small on the pictures but it's perfectly suitable for one person. The balcony is also very nice. I had an amazing stay!