We had a wonderful stay at Jannis and Adriana's. Adriana was the dream host, helping us for many thing (airport pickup, touring the island). She was always reactive when we needed something and had all these delightful attentions for us (baking us a cake, offering wine and a gift for our baby boy).
As for the studio, it is just beyond words to describe it as it has a perfect terrace overlooking the sea and the beautiful island of Anafi. The equipement is good for a lovely stay and everything is super tidy and clean. But once again eating on the terrace or just simply wake up and just watch the sun rise from your bed this is something you can seldom do. The place is in busy Kamari (during summer) but is sufficiently off the main roads to enable you to have only the waves bother you. It is by far the quietest place we ever stayed in. We will definitely return there for our next vacation in Santorini.