Efi was very communicative and helpful throughout our visit. We were landing at Athens very late at night - Efi arranged for her trusted taxi driver to pick us up from the airport and show us in to the apartment which was really nice. The apartment was more spacious than we had expected and the location can't be beat. It is just a 5-minute walk to the Acropolis entrance and all the shops and restaurants are right around there.
Efi also provided us with an info booklet containing local tips about cafes, bars and restaurants. We had only 2 days in Athens and being right in the center of it helped us see all the ancient sites.