Eugenia and Luis' place is in a perfect location: 5 minutes away from the Douro's Ribeira, the Cathedral, the San Bento train station, near very good restaurants. You are welcomed by Teresa (I think?) and every little detail has be thoughtfuly planned: a copy of a map with tips and adresses, a couple of nice surprises when you get to your flat. The flat I was in was fresh and clean, decorated with taste. You'll get tired of climbing uphill medieval streets and will welcome the comfy bed and duvet. Canot think of any negative side.