While we did not actually meet her, Amalia was very responsive and satisfied all our needs. The place was clean and well-equipped, and ideally located amidst the old town. You can get everywhere (harbour, beach, shops, sunset) by foot. There are good cocktail bars right outside the fortification, but their nightly noise doesn't make it through the big stone walls. Ideal for young couples who like to party, but also appreciate calm sleep.
Unfortunately the centerpiece of the castro is currently an archeological excavation and looks like a fenced construction site. The street outside the accomodation therefore gets littered quickly (by tourists & youngsters), and the city is not cleaning it regularly. Once this gets fixed, Amalia's place will be a top recommendation for Antiparos-city!