Maria's place is in my the center of Porto, 5 minutes walk from Trindade metro station which makes it quite easy to get to the apt from airport.
The apartment is in perfect location to see Porto, all attractions are in walking distance, we didn't need to take public transportation during our stay there.
The apartment is in a fully renovated building, easy to get in with code. The place is quite spacious for two people, it's on a busy street that can be noisy during night but with patio doors closed it's very quiet. We were there during in November so keeping the doors closed was ok, not sure how that would be during warmer months. Maria's place had everything we needed during our stay, water pressure was very good in the shower. Very comfortable mattress in the bedroom, just I wished there were some firmer pillows. Also we found the comforter very hot, it would have been better if there were some lighter blankets or sheets available.
Maria is great in communications; she is very quick to respond any questions. I highly recommend her place.