The apartment is perfectly located in order to explore downtown Porto by foot. If you do not want to walk or just go to a different city there is a metro station in front of the house and the train station Sao Bento is right across the street.
Around the corner is a small supermarket and lots of Cafés and bakerys.
It is also super clean, quiet and very well equipped (e.g. kitchen utensils, a washing machine, a parasol for the beach, shower gel, extra pillows....) We would definitely stay there again.