The apartment is perfect. Very spacious, very clean and well equiped.
Nasos is very reactive which is a real plus.
The only negative point is that the district doesn't seem very safe.
There is a lot of poverty in the area and it is very dirty. we didn't feel safe to walk during the day so we even didn't try during the night.
However the good point is that there is a metro at only 2minutes walk and we are at only 3 stops to Syntagma, 4 stops to Acropolis.
There is a lot of metro and the daily pass is quite cheap (4.60€ per day and one ticket is 1.20€).