Great location on a charming quiet side street in proximity to all the sights within downtown Porto. The apartment was surprisingly larger than expected and would fit five people comfortably. It was lovely to be able to enjoy the backyard at the end of the day, although the patio could use some maintenance. There was plenty of storage and the kitchen was well-equipped. The property managers communicated quickly. I would definitely stay here again.
Note that the apartment, which is in a very old building, does not have central heat (not sure about AC). I was there during a week that was unseasonably cold. The unit stayed very comfortable during the day but got quite cold at night. Several portable radiators are provided and generally helped to keep the rooms warm, but plugging in more than two at a time could trip a circuit.
Side tip: the unimposing little cafe next door serves amazing breakfast, coffee and pastel de nata. The owners are also lovely.