I would highly recommend staying at Fenia's flat. I didn't meet her personally but based on our communication via whats app, I can say that she is a good and helpful host. The flat was spotless, which I like the most. Every room has AC which you will need in Athens especially if you are visiting during summer. AC was a savior. The location was good, not that far away from the main landmarks, approx 30 minutes walking distance. Close to the flat, there are supermarkets, post office, bakery, metro station, etc.