We had a great stay! João is incredibly welcoming, easy to coordinate with, and he gave some excellent recommendations for food/drinks/sights. The apartment is very nice, well decorated, and bright. The walk is about a mile from a lot of the stuff we wanted to see and do in the city center, but it's easy to navigate and we made it several times over two days. As noted in other reviews, the A/C is only in the room upstairs, but opening up all the windows gives a great breeze since the apartment is on the the top floor. Would definitely stay here again if we return to Porto.