We thoroughly enjoyed our stay at Richard and Nathalie's place. Their beautiful little flat is very close to the city centre, and they are warm and generous hosts. The only small minus point - outside of their control - is that many of their neighbours have dogs who tend to bark throughout the night. Nothing, though, that can't be fixed with good ear plugs. We would certainly recommend this place and would gladly return there during our next visit to the beautiful city of Porto.