We had a short two day stay in Miguel's apartment, and everything went very well. It is large (we were two adults with 2 small girls) apartment in a very good location, you can easily reach the center by foot in max 15 min. The parking is right in the street (paid parking, but very comfortable) or Miguel can give you a card to park in a closed parking nearby, only a minute away on foot. The apartment is equipped with everything if you want to make any meal inside. Would recommend to choose the apartment to feel a real Portuguese spirit of Porto :)