I had a great stay at Gérard's appartment! The apartment is situated in beautiful Alfama, near public transport (train, metro, and tram), Castel de Sao Jorge, various museums, and Tejo boulevard. There is a convience store 2 minutes away from the apartment and many restaurants, among more, Casa da Tia Helena, 5 minutes away.
As the Airbnb is situated in a touristic area, it might be a bit noisy at night. However, it did not affect good nights of sleep.
The apartment is clean with all necessary amenities, and communication with Gérard is quick and timely.
I definitely recommend his AirBnb.