Luis was very nice and helpful! The apartment was clean, beds comfortable, and the location was excellent! The view of the river is so nice; you can see the monastery directly across the river. It is a short walk to the bridge (where you can walk across to the teléferico de Gaia) and to the heart of the old town, but it is on a very quiet street. Also close to a GREAT little cafe (near the bridge), Carmelita Bistro (excellent pastries, muffins, fresh juice, and coffee- in a very cute atmosphere- just a 5 minute walk from the apartment). We'd definitely recommend Luis's place in Porto!