Marco's place was very comfortable and clean. It's located in a very convenient area, about 2 mins from plenty of shops and restaurants. His wife, Carla, greeted us to exchange the keys. She was very warm, friendly, and helpful, and gave us great recommendations to visit. At the flat, they had more recommendations written out for places to eat and see, which was really helpful in avoiding overly touristy spots. We had a great stay and Marco's place made our time in Porto very nice.