The Oia cave house has an amazing location. It's seriously in the heart of Oia. A couple of things to keep in mind about this truly unique stay:
Luggage: you must walk several steep steps to get to the cave house. My husband and I backpack when we travel so it wasn't so bad but we saw a couple staying near us struggling with their large roller bags down the hill. Just keep it in mind.
Humidity: there is no air conditioning in the cave house (as far as we could tell). There was a godsend of a dehumidifier in there which filled up after about 6 hours. It's not anything like Thailand but it's still a big muggy. Just to set expectations.
View: you will not forget the view. It is unbelievable. Buy some wine and sit on the deck because it's gorgeous. Pet a cat or two that come by.
Location: when you get there, pay attention to the way you walked from
The Oia square to the house. We got lost when trying to come back the second time. Just remember it's farther down than you think.
Enjoy being in the heart of Oia. It's a lovely place to stay.