We thoroughly enjoyed our stay in Vila Nova de Gaia. Gisela's studio is perfectly located just behind the wine cellars that line the river, close to WOW and near the Dom Luis I Bridge for an easy walk across the river (high or low) to Porto.
The space is bright and clean. It was equipped with everything we needed for a comfortable stay for two people.
The only down side was the flights of stairs to reach the unit, but this is a minor consideration after climbing hills and stairs to visit and enjoy the beautiful sites, restaurants and shops in the Porto and Vila Nova de Gaia area.