This is a wonderful apartment with incredible views of Oia. We enjoyed the sunrises from the balcony and using the hot tub (seems they need a prompt to get the tub hot) during the day and evening.
The cons: It's super expensive and the bedrooms and bathrooms are quiet small and awkward. You also have the porter's family living downstairs in the house and the apartment above being rented out too. One of the bathrooms super small and is outside. This apartment is not suited for tall people as the doorways were very low. And it was not easy climbing the wooden ladder to the upstairs bedroom (there is no privacy between the downstairs double bed and the upstairs double bed).
Please let them know ahead of time if you need use of the sofas as beds for your stay.
So it was a great stay, but I would consider a different base at this price for next time.