My wife and parents stayed at Sofia's place during our stay in Lisbon. The apartment itself was well equipped and centrally located. Two bathrooms and two real bedrooms was a nice feature.
However, the real star here was Sofia - she was easy to get in touch with and very professional, helped arrange transportation from from the airport, provided good tips on restaurants and shopping and, when my parents got sick, helped coordinate our stay for an extra day and checked in to see how they were doing. I cannot say enough positive things. Highly recommended