Sharon's house is conveniently located on the North side of the Douro River. The apartment is cleanly decorated with 4 floors of comfortable living space. Great large windows and appealing irregular shape to the floors. Sharon has a full list of recommendations in and around Porto. Her house is easily "walkable" (as long as you don't mind hills...if you do, Porto is going to be an issue) to almost every one of the recommendations. We were there for the food, wine, architecture, bridges and a river boat tour. We never moved our car.
Sharon was very accommodating and responsive to our need to change our arrival time.