Alexandra's apartment was beautiful and 1 minute's walk to the beach. Vathy-Sifnos is gorgeous. We went there first on our travels so didn't appreciate exactly how great it was. I would recommend ending your travels there and really relax. We also wished we'd hired a car so we could properly explore the island (the bus was on winter timetable so only ran every couple of hours). Alexandra was very friendly and helpful. Highly recommended.