We spent nine days on Sifnos and enjoyed Dioni's place very much. The neighbors are very nice and the view from the terrace is stunning. However, we expected the apartment to have more space (photo impressions), but for two to three people it is more than enough. If you have problems with hard mattresses the bed at this place could be problematic. We also had to get used to it, but in the end we slept wonderfully. I can absolutely recommend this place!