Great Location, Wonderful updated and spacious apartment, A bit noisy in the small hours of the morning - there is a nightclub district just north of the square, but quiet the rest of the time. Wonderful restaurants nearby. Easy walking to the main sites of Porto and nice views of the square out the bedroom windows. There is an underground parking lot directly in front of the building where you can leave your car for 33 euros/24 hours if you need to. Very convenient.
Be sure you know how to operate both sets of keys and the elevator code to get in and out !!! The door key sticks a bit and there is a "trick"
Abel is very responsive and his mother, who actually met us at the apartment, very helpful and gracious.