What a location - so stunning and great being on the riverfront flat as there as some very steep hills. Definitely good walking shoes a must but good trams and buses - still many a hill we climbed. The taxi in Porto are very reasonable so use them to ensure you make the most of your time.
The first floor apartment was just great - as the bedroom walls do not go to the ceiling there is a bit of noise but ok.
Four people in the apartment was a great number with one bathroom - Porto is such a stunning place and a wonderful end to our time in Portugal.