The apartment was beautiful with a view that can't easily be beaten. You can see Acropolis while in bed which is simply amazing. The apartment let's in a lot of natural light which really makes it feel comfortable. Furthermore it is well equipped and you will find everything you need.
It does get really cold once it's less than 8 degrees outside due to it being not well isolated, however I understand that that's not a priority in Greece. I have to say though that once you know that, you can prevent being cold. You can do that with the big amount of blankets in the flat or letting the heater run nonstop.
I can recommend this place to everyone considering staying in Athens. Thanks again to the host who also answered to every message I send him quickly.
Great apartment!