Our stay at Olga's place was amazing! We were a group of 7 people and we fit very comfortably in the house. The location is great as it is a walking distance from the center of Apollonia and next to the bus stop. Olga was an excellent host, greeting us with homemade cake and traditional sweets and providing us with food and bottled water in the fridge. Communication with her was also great. Would definitely recommend for your vacations in the beautiful island of Sifnos.