We've spent an amazing time in Vivian's appartement. It was excatly like discribed, clean, beautiful and so cosy.
You will find shops and great restaurants near by the appartement. Plus, the area was very calm. There're taxis just below the appartement and the subway (omonia) is 10min walk only.
Vivian has been an amazing hostess for us. She picked us in the city to take us to the appartement. She took time to show us a map and gave us precious informations and great adresses or activities ideas. She was cheking on us everyday, and even helped us when we were in Santorini !
We definitely recommand this place, you won't regret it !