As advertised, this unit is a legitimate cave house in Oia, with an amazing view. The unit is thoroughly rustic, which contributes to the charm. It is by no means a fancy place - the furnishings, kitchenware, and bedding were similar to other European AirBnBs we've stayed at that cost a third of the price.
For better or worse, the apartment is in the very heat of Oia. Located a few dozen steps down from the main drag at Nik. Nomikou, the apartment is located in the middle of the older part of town. Again, the view is truly amazing, and it was a pleasure to eat breakfast or sip wine on the patio. The neighboring units in the area are also cave houses, though many have been remodeled to include small pools. Sadly, the neighborhood seems to be 100% converted to AirBnB or equivalent - there appear to be no locals left in the area. The area was also noisy most nights, as other visitors hosted late night parties.
There are many restaurants in the area, though most require reservations days in advance for dinner, as crowds flock to watch Oia's famous sunset. A few small markets are available nearby, too. A free parking lot was avaialble approximately 10 minutes away, though it was mostly full during our stay - this was especially true between 5-9PM. Otherwise, a paid lot approximately 15min away always had plenty of open spaces, at a cost of 17€/day.