Simos was a great host, coming to clean the apartment everyday and to check that everything was okay. The studio itself surpassed our expectations with an amazing veranda that stretched two sides of the studio overlooking the bay. The studio was spacious with all the facilities working great meaning a most comfortable and secure stay. Vathi itself is a beautiful location with great places to eat and relax including the best beach on Sifnos (much better than the blue flag rated ones).