We had a wonderful stay at Fátima's apartment. She is an excellent host who is responsive before and during the stay. She also provides you with a map of the area and good dining suggestions. The apartment is kept in great condition and was super clean! It was the perfect size for two people (the listing shows room for four - there is a sofa bed - but both my husband and I felt that it would be a super tight fit with luggage) and could not be more centrally located in Porto. All of the main sights are within a 10 minute walk of the apartment. The apartment is situated on Rua da Flores, which is a pedestrian only street - lots of good restaurants and shopping nearby.
Our only complaint about this apartment was the bed and pillows. You could feel the springs in the bed and the pillows needed to be replaced (very lumpy). Other than that, we had a perfect stay!