I can only recommend Maria’s place. She is an outstanding host, very kind, available and responsive. She was very accommodating for the check in/check out and helped us out arranging some activities in Athens and Greece.
Her appartement is also perfect: very clean and tastefully furnished. The bedding is very comfortable and the view on the Acropolis is amazing.
It is very well located; you can walk from there to Athen’s main activities and the neighbourhood is very calm.