I do not recommend staying at this apartment if you plan to have regular sleep. The party noise at night from the street was a horrible experience for me. The apartment is located in one of the most busy corners of one of the most notoriouse party areas of Lisbon. Especially on the weekends and on thursday (student night) sleep was not possible for me from 22:00 to 04:00 am. At some occasions party people actually climbed up to the balconies of the apartment making me feel very uncomfortable there. Imagine the party is going on all around you and you are in the middle of it and there is no quiet area to escape. The apartment itself is nice and clean though, located very well within the city and the lady responsible for the checkin is very nice and supportive.