The major advantage is location of the appartment. Neighbourhod perhaps isn't representative, but Metro station (Agios Nicholaos) is very near and easy to access. From there it's easy to arrive to any place in centre of Athens.
The appartment itself is nicely decorated with excellently preserved sort of antique furniture. It's situated on the first floor, and there's an elevator in the building. Both Wi-Fi and A/C work without any issues. In the kitchen there are basic ammenities (salt, coffee, sugar...). The adress is easy to find and to navigate to by car. During our stay there was a plenty place to park on the street, but there is a parking garage opposite of the building. First two hours cost 5 € and then the price is 50 c for each additional hour.
Angelos was an excellent host. He quickly answered any message (no matter what part of the day) and gave us lots of useful advice what to do or see on Athens or how to get there. Also, he was very flexible with check-in and check-out hours.
All in all it's an excellent place for a couple or a smaller family, suitable for a comfortable stay.