Joao and his wife were great hosts.
We were welcomed by Joao's wife who was happy to stay a while and help us plan things to do. They were also available at all times though out our stay to answer any questions and offer help when needed.
The apartment itself is in a very lively part of the city. Its perfect if you want to experience the real hustle and bustle of Lisbon life (the dog upstairs and customers in the nearby restaurant can be heard most evenings so don't come here expecting total silence.)
It is in a great location as you can walk pretty much everywhere (if you don't mind the uphills) and there are some lovely local shops and bars within a 5 min walk from the apartment. We had a really great stay and were sad to leave.