Beautiful view and lovely little cave, but Giannis, our host, won the prize for his wonderful hospitality. He arranged all of our transfers and excursions--including our trip highlight, an amazing scenic wine tour (w/ Giorgos from Be in Santorini)--and a sunset boat tour. Giannis was always available either in person or via Whatsapp to answer questions, and he made our trip completely hassle-free. We could not be more appreciative! Five stars :)
A couple of little things to know: 1) The wifi was too slow to be useful, but luckily they have great wifi at the cafe across the street. 2) As shown in the photos, there's very little privacy in the cave because one bedroom door has windows in it and the other is just a curtain. It wasn't a problem for us, but I probably wouldn't bring my in-laws! Also, just keep in mind that the stairs down to the 2nd bedroom are pretty steep and probably wouldn't be great for everyone.
Overall, we had a great time! The location was right under the main walking street in Oia and was very convenient to shops, restaurants, etc. Thanks again!