Stay here. I know how it is: you read countless reviews, you star a bunch of places, you stress over the decision because you want it to be perfect. This will be perfect. Artemia's place is right on the caledera, with breathtaking views. You'll be right in the center of Oia, the most picturesque of the famed Santorini towns. Up on the main walkway, there are countless restaurants and cafes, but descend the stairs to your Air BnB and you can escape the crowds and enjoy a peaceful moment on your terrace with breaktaking views. Artemia is very responsive, super kind, and extremely helpful.
A couple notes: traditional cave apartment is spacious, with seating area, bedroom, and kitchette. Water is hot and doesn't run out. The terrace is shared with one other apartment, but we hardly overlapped with the folks in that room and when we did it was pleasant. Everyone is relaxing and there to have fun, so no harm in exchanging pleasant conversation or sharing a tea.
We enjoyed a fancy meal at nearby Floga but loved venturing off the main strip for less touristy meals, esp. at night once the sun went down and its harder to enjoy the view. Check out Fino for great cocktails and a lovely meal.
Again - you won't regret booking this one. Don't think twice.