Location - about 10 mins walk into the start of Oia and about 20 to the castle. But nice to be out of the bustle, and have this stunning view all to yourself. Also it's exciting to see the occasional helicopter coming and landing just two doors down from the house! And if you walk along the track under the house, turning left, you have a great hill walk/climb along the rim of the caldara / up to some little churches.
House - you're here for the view: it's amazing. The bedrooms are quiet and down below, with the living room / kitchen / dining table on the level above and leading onto the patio. The house has renters as neighbours each side but they're laid out in such a way that you don't feel too on top of each other. And they can be useful for sharing travel tips!
Host - Aris was incredibly helpful, both before, during & after our stay (Norwegian cancelled our flight home!). He sorted airport / port transfers and suggested yacht hire companies: he can sort anything on the island.
Oia - very busy, even in mid Sept, with tourists around sunset: expect the pavements etc to be jammed. But interesting little shops, some stunning restaurants if you seek them out & are prepared to pay (Lycabettus)