Our stay at Fanis & Tina's 3 Stones Villa was like being treated as royalty. Aside from the absolutely beautiful place and the gorgeous views, F&T and Calderon Suites are a professionally run, well-oiled machine. They arranged for a driver from the port, had an assistant take our bags and walk us to the property, and they associate Leona seemed genuinely excited and invested in my wife and I having the best possible experience during the time we were there. Any follow up questions we had were answered very quickly and always helpful.
This is the kind of place you should plan your Santorini vacation around. As in, wait until it's available, book it, and THEN buy your plane ticket.