We were traveling with my husband, and we had a great stay at João's apartment. It is located in the center of Porto. Just a few minutes walk from the metro (that we took from the Airport) and sights.
There is a little coffee shop under the apartment, where you can have breakfast, or try the traditional dessert: nata. Down the street there are several restaurants as well for lunch and dinner.
A shopping mall is just 5 minutes away.
Although the apartment is very close to the center, the street was quite at night, and we had very good sleep in the comfortable bed.
João always answered quickly, and helped us with every question or request. He helped us out with detergent for the washing machine (which also has dryer function!), and let us leave our bags a little longer in the apartment, so we were able to walk around the city until our flight at night.