I had a great time in Porto and enjoyed staying at the apartment. I never met Marcia, but she was always available via airbnb to help me.
The apartment was very clean and is well-equipped. The area around the apartment is a bit deserted as some buildings are not inhabited. However, the location is well-connected to the PT. Luis Bringe and the metro and everything else! There even is a nice backery very close to the apartment!