The Opo Arte Apartment is amazing! It's very stylish , roomy, and has all of the modern conveniences one could as for. It's close to everything in downtown Porto; one can walk to and from the Sao Bento train station (unless you are overloaded with luggage) and it's also an easy walk to the Douro River/Ponte Luiz bridge and the Cais da Ribeira (restaurants and markets along the river by the bridge). Take Sara's advice and book her recommended Douro Valley tour. The views, food, and wine (much wine!) will forever be one one of the best day trips I have ever experienced. Most of all, Sara is incredibly gracious, knowledgeable (as is her husband) and they will do everything they can to ensure your stay in Porto is perfect.