We had a very nice time in this apartment. The location is just perfect to visit the city, go out for dinner, and to go to the port and the airport by public transport.
The place was clean and tidy. The common area that connects the rooms was welcoming but we found it a bit too cold maybe. Another thing, we didn't have toilet paper in our bathroom and weren't able to find it anywhere else in the apartment, but no big deal, all the rest was perfect :)
Also, Konstantis is very kind and thanks to his explanation it was so quick and easy for us to check-in and out.
To conclude, for sure we recommend this place, in the very heart of Athens, to anyone looking for a short stay to visit all the main places of interest of this beautiful city.