Theofilos made an instant check-in for us (in 1h after we booked the apartment). Also he was very quick to answer and once he saved us when we got locked out of the apartment and could not come in. He came in 15m! We are very thankful for that. About the place... It is clean and it has a very good location if you don't plan to take the metro. It has walking distance to Acropolis and all historical center. It is also close to the Athens cemetery, you should visit it (put anti-mosquito cream and may be bring some cat food), it is outstanding place!