Very nice place: what you saw is what you'll get (the flat is really tastefully decorated). Immediately surrounding area is nondescript but close by convenience stores and good restaurants (we would notably recommend Prosopa: good food, fantastic service: https://www.tripadvisor.com/Restaurant_Review-g189400-d798713-Reviews-Prosopa-Athens_Attica.html) and a few minutes walk from the subway that will get you to Acropolis and surrounding areas in a pinch. We were not able to test Kika's responsiveness in case of problem ... because there was none, but she regularly checked that everything was OK with us (it was).