Worth all five stars for all aspects! Highly recommend this apartment, as it is in the vicinity of almost everything important (museums, bus stops, grocery shops).
The apartment is spacious, and comfortable, the neighbours are quiet (we were too).
And Vasiliki, our host is very kind, proactive and patient. We had almost a two hour long delay on our check-in day, but she was understanding.
Next time I'm visiting Athens, I'm looking for this place again for sure!