Positives - Very well-appointed flat with modern furnishings. Sparkling clean with nice personal touches - soaps, shampoos etc. Beautiful view over city from bedrooms. Beds super comfy. Owner was very facilitating and booked our taxis with a lovely driver.
Things to note - Flat is up several flights of stairs and there is no elevator so wouldn’t recommend for elderly people / families, but fine for us. Quite centrally located, though the street is quite run-down (broken windows / boarded up places) but that is a common issue in Porto.