We had a great stay at Marcia's place! The flat is spacious, well-decorated and it has a really nice terrace. Its location is also perfect, right in Porto city-centre, next to the metro station Trindade (which takes you directly to the airport with line E).
Marcia welcomed us despite our late arrival and we always had good communication. If you're a couple looking for a nice place to stay in Porto, this is definitely the flat I would recommend!