This place is in Kolonaki, a posh, clean, safe and very nice area close to the center of Athens.
You can reach the Evagelismos metro station within 5 minutes which can bring you to anywhere in Athens. The apartment was super clean and the kitchen was great. Vivian was a great host and always available. She reacted incredibly fast on requests or questions. Can't be a better host. Especially if you like to stay longer, this place is a great option.