This is a very nice apartment with a lovely terrace out back, where we spent much of our time when at the apartment. It's also a great neighborhood with lots of interesting shops, bars, and restaurants. Maria was always responsive to any needs and requests.
As for Porto itself, the Ribeira waterfront is about a 20-min. walk away down the hill, and a lovely place to have a drink and bite to eat while watching the world pass by. Don't miss walking into any church you pass by to see the amazing iconography and statuary. Finally, discover all things vinho Porto -- it's much more than just the ususally one-variety tawny offered in bars/restaurants back home.