I've got to say Ioanna was a delight! She and her husband greeted us when we arrived and her husband even helped us with our luggage which is no easy task in Oia where there are many steps.
Ioanna and her husband arranged tazis for us to and from the airport. They also helped us arrange horse back riding near the black beach and answered any questions we had during our stay.
The place is great if you want to see the famous sunset with your own private rooftop. The place itself was spotlessly clean and perfect for two people. It is much better than paying double or triple the price somewhere else in Oia.