Apartment is very spacious and with a nice decoration. For a short stay it is really great.
System of keys makes arrival and departure totally autonomous so very cool if you have flights that are very early.
Balcony is not interesting as the view is on another close building.
Concerning the area, you are cleary not in the center of Athenes or touristic places but you are 20,25 minutes walking from point of interests. I have done everything by foot and it works really great. Do not need taxi or buses.
One good point is that you are really close (less than 15mn walking) to the street of all restaurants (Apostolou Favlou) that have a view on the acropolis, perfect for a night restaurant with a view !
Only default that I had during my stay is that the neighborhood is really loud on weekends with musics and clubs and I struggled to sleep, my last night I had a very early flight, I couldn't sleep with the noise so I had the feeling to pay a night for nothing...
So if you come, on weekends just bring earplugs and it will be fine !