Just do it. This is a fantastic little new apartment beautifully presented with everything you could want in an awesome location close to virtually everything and just outside the hustle and bustle of the core tourist area (5-8mins walk). There are some fantastic little cafes and restaurants just through the park and down the hill. I urge you to try Hungry Biker for breakfast and Farihna for stunning pizza with a Parisian touch (run by French people). For an authentic Porto dinner try Taberna Santo Antonio - a hoot !