We appreciated our stay in Santorini. Living in this cave is an extraordinary experience. It is perfectly situated (in a very quiet place).
Make sure you can stay in a room without any window, it's amazing !
There were people working in the cave placed next, the terrasse was not really available, but Elvira was accomodating, to make our trip as well as possible. We recommand this flat for 4 persons, not 5 (we were 5...).