We stayed three days at Giorgio’s and Lampini’s place in Finikia. You can access the house only by foot (like the rest of the village), and then you enter in a very quiet place, full of cats and vegetation. The apartment is small but effective with everything you need for a couple of days. We were with our son (almost 2 years) and the only thing you have to be aware of is the low parapet on the balcony (like everywhere in Greece).
The mini-market (with a large choice of small things) at only 100m was very convenient.
The trail between Fira and Oia is only at 5 minutes, and from here you can go to Oia very easily and enjoy a nice view.
A homemade map is available at the apartment and is very useful with tips and locations you can need.
We wanted to escape the crowded places of Santorini and this place was exactly what we wanted, quiet and pleasant. Highly recommended !