This was easily the most stylish place we stayed, with the absolute best view of the caldera. The wooden floors and cave ceilings and built-in cabinets are charming and original, and the porch from the top bedroom was hard to beat. We brought home dessert and wine (beautiful dishware), and talked on the porch while the sky got dark. I saw a shooting star.
Fanis and Tina were wonderful at communication -- very responsive -- and super helpful at setting up a porter both to and from our dropoff in Oia (necessary!) and a shuttle to and from the port (same cost as a taxi, and nice to have it pre-planned).
The only thing we didn't know to expect were the tourists. Though the house is nearly at a dead end of a path, several tourists passed by our door in their wandering. And each time we came or went from house, after traversing lots of steep steps, we encountered rude tourists taking photos of the hills or doing photo shoots of each other, climbing on some properties (!) and generally cramming the very narrow path back up to the extremely busy main stretch of Oia. In fact, at golden hour, an old woman stands near a gate and yells at anyone trespassing down the path (she's not there all the time, though). We did not enjoy walking around or coming and going from the house -- it felt like a chore every time -- and despite the view and the darling house, we wouldn't stay in this dense area again. That has nothing to do with Fanis and Tina, who were great, but the area was trying and greatly detracted from the experience (we were there late September, when the season was supposed to have died down a bit; maybe it's better in October or November?).
We visited Atlantis Books (highly recommend!) and did a tasting at nearby, charming Sigalis Vineyard (only 25 Euro for three people, also recommend).