Rena was an amazing host to us, and her staff/associates were lovely as well. The cave is beautiful, and the Jacuzzi tub was excellent, as was the view. Rena was great with communication, and allowed us to check in immediately after our early flight, and had her very sweet cleaning lady set up a play pen for our 5-month old. This wonderful cleaning lady also was in the cave to greet us with fresh espresso when we arrived, and show us how to operate the machine. The porter (who meets you upon arrival to help with your luggage, and will take you down the fairly exhausting trek to the private beach and sea kayaks - which were AWESOME) and the wine, juice, toast, jam, cake, etc. were very welcome perks as well. As advertised, the balcony IS shared, so I suppose that you forego a little bit of privacy. Rena was also kind enough to arrange for her private driver to pick us up at the airport, which is great because we were too exhausted after our early flight to wait for the bus to Oia. She definitely does everything within her power to make sure that your stay in Oia is magical (i.e. candles on the balconies after sunset).