Our stay at Aunties Villas was really great! Marios is a super nice host and is very helpful and responsive.
The location of the villa is really conveniently placed in the center of the island and is ideal if you're planning to explore all sides of the island (North, Central and South). Although you would definitely need to rent a car for best experience. The roads in Santorini do tend to get quite a few slopes and narrow sections, but you get used to it fairly quickly by the second or max third day.
The warm Jacuzzi in the villa was really cool too, especially in the evenings!
Me and my wife really enjoyed our stay here and would definitely recommend Aunties Villas to other fellow travelers.