The flat is amazing. It's nicely decorated, you can chill in the living room watch some tv, or you can make a nice delicious dinner in the kitchen, or relax in a hot bath/shower, even invite a few friends over for some quality time, or you can enjoy the comfortable bed and sleep very well. The place is near to all major tourist attractions: the nearby metro takes you easily everywhere, in two stops you can be in syntagma square, then walk to monastraki square, go to museums, the Acropolis, not forgetting the many coffee shops and restaurants. I went alone, I stayed for almost a month, and I had no problem of safety or otherwise. I recommend this place completely. I myself am returning as soon as I can.
Thank you, Stavros!!!