The apartment is very centrally located, we walked absolutely everywhere. It was clean and while the living room had windows facing a very noisy and busy street, the bedrooms were facing the other side and it was very quiet at night, even with windows open.
The check-in process was smooth and easy. We also appreciated that the host arranged taxi for us at 4:00 am on the day of departure so we could get to the airport on time.
Overall very good experience, would definitely recommend this place to anyone visiting Porto.