The flat is just as described above. We had a nice stay there, communication before and during the trip was very easy and the host were helpful and flexibel to offer us a solution to let us leave our luggage in the building, since we had some extra hours after check-out and before our flight home. There is some noise from the streets, especially at night, as mentioned in other comments, but it's probably the same for all older buildings in Porto, so not the hosts fault.