Filipa's flat is located in the heart of the Alfama/Castelo area, close to many restaurants, cafes and fado houses. It is perfect for couples, well equipped with everything you'd need for a stay in Lisbon, and the centre of town is easily reachable by foot or by tram (including the Sé, which is 5 minutes' walk downhill from the apartment, and the Castelo, 5 minutes' walk uphill).
The restaurants nearby do produce noise until around 11pm, and there is a bit of noise from the road just below, but as the bedroom is set at the back of the flat it is not too disturbing.
Filipa is an extremely accommodating person, and was kind enough to introduce us to Lisbon and provide us with pointers and free guidebooks to read, which we greatly appreciated. If you're looking to stay in a lively area while being close enough to the city centre to make walking easy, then I would not hesitate to recommend Filipa's flat to you.