This is a wonderful little apartment, relatively central in Athens, the Sepoia metro station is a 10 minute walk away so you can easily get anywhere in Athens. A large supermarket is only a couple of minutes away from the apartment which we found to be extremely convenient.
Nikos is very friendly, responsive and helpful. He makes you feel very welcome and is happy to answer any questions. We asked him for some recommendations and he provided an extensive list of local restaurants, cafes, and sights to visit. On arrival the fridge was already stocked with all the essentials, like butter, bread, and cold cuts. As well as fruit, bottled water, and some local alcohol. We had a small problem with the Internet connection and in no time at all Nikos called the Internet provider to fix it.
The Air Condition works well and kept us comfortable even while Greece was going through a record-breaking heatwave, it is located in the living room, however the living room couch can convert into another bed allowing you to sleep in the cool comfort of the AC.
The neighbourhood feels nice and safe, and the neighbours were very friendly.
All in all I do not think you could ask for a better place to stay in Athens for such a reasonable price.