I have been to Athens many times and this is by far the best Airbnb apartment and location for the same range of price I have rented. The apartment is on the 2nd floor of the shop lot building so you will need to walk the steps but it is not difficult. The location of this apartment is perfect. It is right in the city centre of Athens.
Walking out of the apartment building, u will find yourselves in the midst of restaurants, cafes, shopping. It is very near Syntagma Square, plaka and monastiraki.
The apartment itself is very comfortable with a lot of details put into making it much more comfortable for us. We were a group of 6 people and the space was good. The kitchen had a lot of amenities that made it possible for us to cook some meals. There was a washing machine too.
Overall, it was a perfect stay. Host was very responsive, apartment was clean n comfortable in a perfect location.