Illias was very reactive and helpful (his father drove us to the airport). The location is in a very quiet place, more authentical than Fira and Oia and not far from busses or cities. If you are going on Santorini, you should rent a car to move around.
The hostel is quite place with a large pool (that was a blessing !).
If you go there we strongly advise you to eat at a restaurant near here : Roza’s.