Our small family stayed here and had a lovely time.
The place was spacious, comfortable and felt very atmospheric in the cave.
Pastries were brought to us each morning, and the hospitality was outstanding, with Matina arranging a car rental and airport transfer, even helping us without bags at check in and check out.
The location is a bit outside of Fira and to properly explore the island, I do recommend renting a car.
Highly recommend staying here for a quiet and friendly stay in Santorini!