Had a great stay in Joana's apartment. It was very clean and comfortable with lots of space. There was some bread, cheese, milk and tea left for breakfast which was a nice touch. The location is perfect - a short walk to the riverfront and very easy to get to from the airport and metro. Will definitely recommend to anyone visiting Porto.
The only small downside is there are construction works happening outside the apartment, with some of the streets blocked off. The works start quite early in the morning but the windows and shutters block most of the noise.