Loved it, the apartment was great, literally 2 minutes walk to the beach, with all the amenities that you need (save for maybe a table for the balcony).
However, what really made the stay the best stay I have had with Airbandb, was the host. I could not have asked for any more, contact was easy, very quick response and with the best local tips. The host told me about Sao João festival and where to watch it, and this experience was magical and was the highlight of the stay.
Also on arrival at apartment the host made me feel really at home and comfortable in the apartment, this made me relax and really have a fab time.
I would without doubt tell anyone that was going to Porto to stay here. It has the best of both, the centre which is easy to get to and the beach with restaurants in walking distance.