We ended up not staying in this apartment because we had an injured guest who unfortunately fractured her leg. The apartment was situated on the top which was a 5-10 mins walk away from the carpark. You could either employ the donkeys to carry you or your bag up if you would like for 10 euros.
However, despite the last min cancellation with no refund offered from Airbnb, the host offered to refund me 40% of the amount I paid as a kind gesture. The host was very nice and accommodating and communication was very smooth. He responded really quickly to my queries and even helped me to source for a wheechair in Santorini.
Highly recommend this place.