We just spent 2 months in Portugal - staying at 7 different AirBnBs, including 3 in Lisbon. This flat was the best one by far in Lisbon! It's right next to Principe Real, Flores, and Barrio Alto - so it has a lot to easily walk to. At the same time, it's on a super quiet street and a pretty quiet building. We had our 7 month old baby who is pretty sleep sensitive, and it was never a problem! Also, the view from the balcony is stunning, we had lots of sunsets on the balcony with a glass of wine.