Giannis was the most attentive, kindest host. He was literally like a concierge and helped us with every question. A car service waited at the ferry for us that Giannis arranged. I would suggest that as there are no addresses on Santorini, so everything is found by the name of the location and the city. We rented a car one day from Giannis, which worked out great (stay on all main roads, don't try to take GPS shortcuts- off roads aren't great and can be very steep in parts.) The other days we took buses -easy but they don't always run on time.
The apartment was spotless and a lovely cleaning lady came daily to clean and leave towels. The apartment was really lovely. We had lots of hot water every night (it uses solar energy) so shower at night rather than in mornings if there in a season with a lot of clouds & rain. We were there in March and it was fine.
The location is central to the whole island. There is a large grocery store around the corner to buy water and food if needed.
We would definitely come and stay with Giannis again! It was an lovely stay!