We had a very nice stay in Joana's apartment. Lisbon is a beautiful busy city, but although the apartment is in the middle of the city and only a couple of minutes from the big avenue da Liberdade (where you can take the metro) it is located in a quiet little street where you can can forget you are in the big city.
The apartment is beautifully restored and offers a complete kitchen and bathroom.
Joana is a lovely lady who really cares that the people that stay in the apartment enjoy their time in Lisbon.
I can really recommend staying with her if you want to visit Lisbon.