The apartment is near the city center, we walked everywhere by food. We had the chance to put our luggage in the morning when we arrived in the flat of Paulo's mother, which was very kind. But she only speaks portuges, which was no problem, but just to know.
The street outside is a bit noisy during the day but at nights its okay.
The perfect apartment to stay for a couple of days in porto, I would book again. Thanks Paulo :)