After having visited all the Island of Santorin, I think Christina's house is one of the most charming, best located and authentic place to stay in Santorin. Having a breakfast or a cocktail on the terrace facing the sea is just an amazing show. It's very close to Oia, but in a very quiet area (I would not recommend you to stay in Oia itself since it's way over too crowed).
The house is like new. All équipements you need are present.
This place made ou stay in Santorin a amazing time in family.
Christina was always available by WhatsApp to arrange checking-in. We was present at arrival with a friend who help to bring my parents suitcase. That was very nice from here.
I highly recommend this place if you wish to visit Santorin.