the apartment is in a perfect area of town. 5 minute walk to trindade, which gets you directly to the airport but also links all the metro lines. but most of what you want to see in porto will be within a 20 minute walk from the apartment anyway!
communication and check in was easy and flexible. pedro was available on WhatsApp to answer all my annoying questions.
apartment itself is clean, modern, excellent facilities, and even has a lift! convenience store and bakery right downstairs.
only thing to keep in mind is that it is a new building and they haven't insulated from noise too well. you can often hear movement in the another apartments. nothing major, but if you're a light sleeper, you will need ear plugs. the neighborhood itself though is very quiet and safe.
overall, great stay! thanks Pedro