We truly enjoyed our stay at Maria's and Manuel's. Communication was super easy. We ended up locking ourselves out and Manuel answered our call late at night and drove 45 min early the next day to drop off a set of keys. The location of the apartment was perfect - central but also quite. The apartment was clean and comfortable. Highly recommend staying here if you are visiting Porto. Also highly recommended eating at Tapas 65 located directly across the street - so good!