António and Fatima run a spotless, well located guesthouse 5/10 minutes walking from the center. They welcome you with an espresso, a pastel de nata and tips for things do to and see in Porto. Great value for your money. There's no WiFi available. Something we didn't know before we arrived (partly our fault/partly the somewhat unclear description) but this is not a private home, rather a hotel/hostel guesthouse with several rooms. So be prepared to share the spaces and bathrooms with several other people while you're there.