We stayed 3 nights and absolutely loved it! Nikos and Dora are very welcoming - even providing a bottle of wine which was great to have on the balcony after a day of traveling with a gorgeous view of the sea and mountains. Nikos went above and beyond with recommendations and booking taxis. Kastro is a must see when in Sifnos and very walkable with bars and restaurants on our door step and bus links to other beaches and Apollonia. Would definitely stay again and highly recommend!