We definitely recommend Gisela's place for 2 people when visiting Porto!! It's very central near the train station, the cathedral and the riverbank. Everything is walkable! Clean apartment and very comfortable bed :) gisela was very easy to communicate with and responded to us within the minute all the time! We stayed on a Saturday night, so there was some noise carrying from the streets from late night partiers but but wasn't too disruptive. Thanks gisela for a great stay :)