Choosing Marcia & Vasco's apartment for my stay in Porto was an excellent decision. The apartment is exactly like in the pictures: very clean & cosy, with a good & smart design. Marcia made sure to give tips for things to do / see in Porto, when she greeted me at the apartment. The neighborhood is both quite and central - the apartment itself is 10 min away from the 24 de Augusto Metro Station or 15 minutes away from Bolhao, by foot. But, as we're talking about Porto, be prepared to climb some hills ;)
I totally recommend the location & will keep it in mind if I ever go back to Porto.