Kiriaki's is a very nice house for a couple or a family. We enjoyed the outside, especially at night. Vlychada is a nice place to stay in Santorini, it's far from the crowd and easy to discover the south of the isle.
The hosts are very welcoming (we had food and water waiting for us), and the communication is easy and quick. Don't hesitate and book for an authentic stay in Santorini.