My heart sank when I approached the apartment building where the unit was located. It was right next to a very busy thoroughfare leading to the Plaza of the Marques de Pombal. I was very concerned about traffic noise and sleep quality. Then I entered the unit and saw that additional noise-insulating windows had been installed in front of every door and window, and the place turned into an oasis of quiet with traffic just being a faint noise. The result was that I slept really well in this place. A huge advantage is that it is located about 130 m away from the metro station Marques de Pombal, and the metro will get you inexpensively, quickly, and safely to all major sights in Lisbon. The place itself is elegantly furnished and a pleasure to stay in. For those who might need it, there is also air-conditioning in every room. The washing machine worked great, and my clothes were dry within a day (no dryer in unit). Overall, a very nice stay.