We had such a great time staying at Rosa's apartment. The location is very central; you can easily walk anywhere in the city from there, but it was also nice and quiet. It's easy to get to the apartment from the airport using the metro (or a cheap uber ride) and there is a supermarket 5 minutes walk away. Rosa was a delightful host and Joana and Eloi always communicated very promptly with us and helped us out when needed during our trip. The facilities in the apartment were good - a great shower, comfy bed, wifi and a well equipped kitchen (the balcony has a lovely view over the city, so we enjoyed eating in on a couple of evenings) and it was immaculately clean. We would thoroughly recommend staying here if you visit Porto!