Amazing location and an authentic-looking place. It was lovely to wake up to the Caldera view every day.
The property manager was super friendly and helped us to arrange activities and taxis. My tip would be to check with him when different service people are supposed to come - otherwise your private dip in the pool is going to become not so private. On that note: remember that nowhere in Oia is totally private because crazy tourists will climb anywhere for a good photo...so maybe no skinny dipping :)
We thought for the price facilities could be a little better: shower was low pressure and a tad smelly (I guess it's a cave house side effect) and mattress was atrocious (this was replaced on our last day).
Overall great stay and I would recommend it while staying at Oia because you just can't have it all is such a touristy place. Plus, having a jacuzzi/pool adds cost to any accommodation and in Oia it's super awesome to have because temperatures soar when you climb up and down those beautiful stairs!