I can't recommend Fernando & Andreia's place more. They were both incredibly hospitable, communicative and exceptional when it came to ensuring I checked-in smoothly (despite hours and hours of delays). They offered me suggestions of places to go see, they even sent me direct links to the train between Porto and Lisbon. The place is spacious, beautiful and close to many amenities. Highly, highly recommend. If I return to Porto, I'd definitely stay here again.