I have stayed in more than 10 airbnb places around the world and Maria's was one of the nicest. Not to mention that the communication was excellent and she was able to answer all my questions before the stay.
The apartment is easy to find and better than the photos. It had everything I needed and was spotless. The bed was super comfortable and what I needed after travelling for more than 4 months. I would not hesitate to stay there again if I return to Porto.