Located in the center of Baixa Chiado but on a street that’s much more quiet than the rest of the neighborhood. The hosts were very accommodating with letting me check in earlier as well. The apartment is spotless with great amenities: washer, dryer, coffee, tea, microwave etc etc- literally everything . I’ve stayed at multiple apartments in Lisbon and this one surpasses all of them when it comes to amenities. There are 2 other rooms in the flat But sound was never an issue as everyone respected each other in the space. Would definitely recommend staying here . I don’t know what mattress they have in the bedroom but I slept like a baby every night! Comfiest mattress ever! The 5 flights of stairs seems like a lot in the beginning but you get used to it. I hope to stay here again when I come back.