Of the 30-40+ Airbnb's I've stayed in this is definitely top 3. It's basically a hotel room (private bed and bath in it's own unit) located about 1.5 km walk from downtown and less than 50m from a metro stop on the best line (the one that takes you right to downtown through Sao Bento and across the Luis I bridge to the port cellars and the best view in Porto i.e. the one of the Ribeira). Helena is incredibly kind and thoughtful, letting us drop our bags off early and leave them late as well as leaving food and additionally bringing over baked goods later that day, giving lots of recommendations on things to do and places to eat, and answering all our many questions very quickly (including where to find a place to print our boarding passes - thanks Ryanair - when we accidentally waited until a national holiday and all our planned shops were closed!). Room is clean, wifi is fast enough to stream an (admittedly not HD) movie, hospitality can't be beat. As long as Helena is offering this room this will be the only place in Porto I will be staying.