The apartment is small, cozy, but well equiped. The host is responsive, Elli gave us all necessary information during our (10 nights) stay.
Location is great, well connected with the rest of the city via Petralona metro station which is close to the apartment.

Neighbourhood is safe, there are bakeries, super markets, caffe bars, fast food stores...
If you are staying in the apartment by yourself it would be ok, but for two it is very small space so you have to be careful while moving.
Terrace in the apartment is the best thing, almost bigger than apartment itself, but during hot summer you can use it just before 8,9 AM and after 6PM for example. If you think that you know what is hot summer, you don't until you come to Athens 😏. But AC is working ok and you have to use it every day.
If you don't like cats, better don't go to Athens and all, it is a city for cat lovers. We had an interesting visit by one of the nearby cats which was visited us couple of times while we sat and enjoy on the terrace.
If you looking for comfort and space this is not for you, but if you are looking for the apartment as sleep over and chilling on the terrace during night in the summer this is a good fit.
All in all - good value considering the price, which can be very high in the capital city. Also it is important that is quite safe area of the city, because Athens is huge and there are parts that you really don't want to visit...