We really enjoyed our stay at Giannis' place! The apartment was gorgeous and was kept immaculately clean. It is also a 20 minute walk from Santorini's best restaurant, Metaxi Mas. We rented a car at the port when we got off the ferry and this was ideal, the apartment provided a perfect base for us in the centre of the island. As we had the car we didn't look into public transport but there seemed to be plenty of public transport around and there was a scooter/ ATV rental next door. I would recommend getting a car/ scooter for getting around the island.