Echoing the vast majority of the reviews below - this is a top notch place to stay in Santorini. Antonios is an incredible manager and host , the amenities are lovely, the house is an incredible restoration of a late 1800s cave home, the bar upstairs is incredibly hospitable - everything you could ask for in a stay at Santorini with a view of a volcano :)
We stayed during winter, so it was lovely and quiet - except for construction noises that awoke us early in the am! Just a heads up - if you choose to come in winter to avoid crowds, you may run into the season of repairs.
Thanks to Antonios and the lovely community of Thira for a wonderful stay!