I stayed in Joana's apartment for five days and had a really good time! The apartment is located perfectly, near the old city and near nice restaurants, and is decorated very nicely. Everything you need is available in the apartment. Joana was a really good host, she had some advices about the city, was waiting for us when we arrived and we could reach her any time we needed her.
If you consider a visit to Lisbon, I recommend a stay at Joana's place!