Pano Meria Studio One has the best view of Oia! Gill is very friendly and helpful, we enjoyed the hiking path from Oia to Fira which was recommended by her:) and her restaurant Lotza is great with nice food and view. Highly recommended. They have a few other choices of houses which I guess all are nice. Just for information, studio one has the best view and its balcony is spacious, but it's on the main pedestrian path; the cave house is more quiet and private and the setting in the room is nice.