I stayed a total of 4 nights and Marco and Carla's. In short, the place itself was wonderful. Porto itself is a hilly city, so the few extra steps up to the main door and then up to the apartment were alright. The neighbourhood in which this place is situated is very local- I loved it. Its equidistant to most attractions, apart from the market which is a rather long walk away, but if not the Riberia, the Torres Clericos were all nearby. A word of caution for the light sleepers- theres a bustling night scene even within such a small street till the early hours of the morning. For me it added a welcome tinge of local vibrancy, but if you want somewhere perfectly quiet in the middle of the night then you might want to come prepared. Apart from that Carla (whom I interacted with) was a very patient and welcoming host, so thank you for that!