This place is amazing! I highly recommend it for your stay in Athens. The location is wonderful. The apartment is right next to the metro and across the street from the Acropolis. Unlike some parts of Athens, the neighborhood is very clean and easy to walk around. Even though it is right in the middle of everything it was still quiet at night.
The apartment was spacious and easily accommodated our 4 person group. There is a small balcony for breakfast or wine and an air conditioner in every room. It was also very clean and the beds were comfortable. Additionally, communication with the host was very good and both check-in and check-out were quick and easy.
Finally, if you stay here, I recommend eating at Arcadia, which is right down the street. The food is good and the staff is very friendly.