I cannot recommend this apartment enough. It is right near Monastiraki Square (less than 5 min walk) I would like to emphasize how clean the apartment felt from the bathroom, shower, and bed. It felt like a nice hotel. There is free wifi. There are a couple codes you need to enter to get inside the apartment, so it feels very safe, even being very centrally located. There are plenty of shops nearby if you happen to forget to bring something. There is one queen bed and a sofa. The metro from the airport to the apartment is fairly easy even for being someone who hasn't used a metro that often. While in Athens, there was no need to use the metro because all the main sites were within walking distance.
Amelie made the check-in process very easy and responded to my messages very quickly and gave me advice on how to get from airport to the apartment.
This apartment is an incredible value for the price and would highly, highly recommend booking it for your stay. Thank you Amelie for providing a place to stay that made our trip to Athens even better!