When we arrived, Helena met us at the café near the apartment. She was very helpful with giving us directions, locations of sights and shopping, and supplied us with a detailed map of the area. The apartment was a perfect for the two of us, and was located within walking distance of shops, markets, cafes, and the river. Arturo dropped by to introduce himself, which was appreciated. He even came by on a moments notice to change a burned out light bulb. Both Arturo and Helena were friendly and very professional. I would definitely recommend staying here while in Porto.