This is an architecturally interesting, very well-located and fairly luxurious apartment. The decor was modern and the space well-thought out. It had everything you could need. We went to the necessary sights early (well, we tried!) and would come back to the apartment to swim or chill before going out again at 3:30 or so. As the other posts note, there is a great restaurant around the corner - Cerdo Negra - and a cheap and cheerful one next door.
The hosts were very attentive but unobtrusive. Everything we needed was there (including a welcome bottle of wine chilling in the fridge) and the guides gave us all the necessary information. Full marks to the hosts!
The neighborhood felt safe and women walk very late at night by themselves. The one caveat is that the area is noisy (though I suspect most of Athens is similarly noisy). There was live music very nearby on two nights but not for long. The traffic noise, however, was constant.