Be Sand Apartment is a nice, clean and cozy place, on a second floor of a recently renewed building, right in the middle of where you want to be while visiting Oporto. Plenty of information available in the apartment or near tourist info booths.
Close enough to the subway, train station and bus stop. As Sandra's description says, it is near everywhere you want to go. The apartment is always handy to stop by any time, should you need a break.
Communication with Sandra was quite easy and agile. She is there to provide you from an answer to a solution.
Great place, great host.