I really enjoyed our stay at Catarina and Antonio's apartment. The apartment is walking distance to Alfama, easily accessible to metro station/trams and very close proximity to the rest of the busy/tourist spots in Lisbon (you can take the train 1-2 stops or walk 15-20 min). The place, while small, has all the amenities that you need and is very comfortable for 3 people. Also, while close to tourist spots, the neighborhood maintains its local charm and the people are friendly and wonderful.