Blue Calm Villa is fabulous!
It has everything one could wish for in a holiday rental:

All the privacy you want, overseeing the sea from all the rooms ( you can even see Paros and Antiparos islands from the two terraces),
high standard furniture and bedding (the best night sleep I ever had a tourist accomodation so far).
Located at the best spot of Sifnos Island, just 3 minutes from Artemonas Village.
The terraces have a barbecue , wood oven, 2 dining areas, and sunbeds with the amazing sea view right in front of you!
This makes it Ideal even for family/friends gatherings or parties in which case I would love to come back when I get married !
Stylianos was an excellent host, very responsive to any recommendations that we asked for.
Such a wonderful experience ! escaped from everything ! I'll definitely come back.