Joana and Valentim were great hosts, super helpful with recommendations and available whenever you needed them. The apartment was great, very clean, excellent design and amazing location, on a quiet picturesque side street set amongst the old town, a perfect place to wander and get lost. Everything was close by (usually a maximum of 15 minutes walk to most things), and the river (and wonderful bridge) were just a short stroll away, with all shops and everything else you might need close by as well as being very close to fantastic architecture.
Porto is a wonderful city and Joana's apartment is the perfect base for a trip.