Bruno is an excellent host and his apartment was amazing. Extremely clean (felt like being in very nice hotel) and well located, right by the metro station, 10 min walk from the main train station Campanha and about 15 min walk to the centre. There are several restaurant around that are open late so you won't have to go far to get something to eat.
Bruno provided directions on how to get to the apartment and was there waiting for me when I arrived, and he was always available when needed. I would definitely stay there again if I go back to Porto and recommend him to anyone visiting the city.