Location, location, location! Perfect in every way. The view is just amazing and you will find bars, restaurants, cafes and all the sights within 15 minutes walk. A few people have mentioned noise; although you are right on the waterfront we were never disturbed by any noise as you are in a sweet spot between a busy area to the right and to the left. Boat tours and the little ferry across the river is right outside. The apartment is super comfortable, excellent wifi and AC, the bedroom is small but the bed and bed linen very good and as it is at the back of the apartment you will have a perfect night's sleep. Our hosts organised a taxi service to and from the airport which worked brilliantly and we enjoyed their restaurant recommendations. Obviously there are stairs to get to the apartment which might not suit everyone but I would say it is the only place to stay in Porto!