Daniel's place is close to Trindade Metro which is a hub for many lines and easy to get to from the Airport. It is very central and easily walkable. Just remember that the whole of Porto is very hilly and the climb back can be a little daunting - There is always Uber! There are places to eat close by but we didn't rate them much. Further afield there are better choices including Michelin star restaurants if that's your thing.