We really enjoyed the apartment and it was exactly as advertised. Theodore was helpful and provided us with every information we needed to make our stay comfortable e.g. precise instructions on how to get to the apartment and recommendations what to see and where to eat in Athens.
As others mentioned, there is a tram line near the apartment and passing trams can be heared inside, it was not much of an issue however. Besides this, there is seldom ANY noise from the street.
Only thing we were not expecitng were rather thin interior doors as we could easily hear people in the hall (and vice versa), however this very rarely happend.