I would definitely recommend Marcia's flat! The location is perfect to visit the city and the flat is exactly as on the pictures.
We had an amazing time here: Marcia's husband was here to welcome us, he gave us very useful tips on what to see and where to eat.
The location is very central: all main attractions to visit are in walking distance, there are good restaurants near the flat and you can also find supermarkets. There's a very useful guide in the flat with recommendations on visits and places to eat and drink.
The flat was very clean and quite, all rooms are actually quite big. Perfect for families or groups of friends.
It made us want to come back to Lisboa!