My 5 relatives had an impeccable short-stay in Helena house!
Her attention to detail absolutely needs a 5 stars rating.
Big beds, extra clean house, a perfect location, bottled water, available products to take your breakfast, a nice map with suggested restaurants and nearby visits.
They truly recommend Helena's house... and Foz do Douro is so... so close! at a lovely walking distance. At the end of this experience, I am also a happy guy, since I have convinced them to go for an AirBnB rental. Had convinced them that Helena's house was a secure choice, taking in consideration all the other wonderful reviews.