We had a wonderful time in Marilia's apartment! She is an attentive, sweet and easy going host. Communication with her was always quick and smooth. She gave us maps and tips for our stay in Porto. The apartment is in a node of public transport, perfect to reach every place in the city. Metro stop is in front of the building, and there are also several bus stops. The neighborhood is safe and close to shops and restaurants. The main attractions are 10-15 minutes walking around. The apartment is beautiful, full of sun light. It was recently renovated, plenty of appliances, and most of things were new-ish or untouched. Moreover, everything was spotless! Marilia even left some toys and books for our daughter... so nice!! We really felt at home :-) It's true that it is difficult to park the car because it is located in a very busy street with few free spots, and most of the daytime you have to pay. But, close to the apartment, 7-10 minutes walking, there are a few "garagem" or parkings to leave the car for 7-10 eur/day.
To sum up, great Airbnb experience in Porto, with a wonderful host (moito obrigado, Marilia!!). Highly recommended.