Amazing place to stay!
We were a group of 6 that stayed for 3 nights at Marianne's place, and it was absolutely fantastic. The apartment is spacious, well-equipped and in good condition. The bedrooms are quiet and with nice beds, the bathrooms had everything you could wish for, and more.
The rooftop terrace should be highlighted as well: Filled with green plants and trees, a killer view of the Acropolis (seriously, whenever we were in the apartment we would mostly go up to sit on the terrace and look at the view) and a heated pool, allowing us to go for a swim in March.
The area is central in Athens but is located in a nice neighbourhood - no noisy neighbours and the street is blocked from car traffic, so very quiet as well. Some of the big landmarks are only a 10 min walk away, so no need for commuting. There are plenty of good restaurants in the near vicinity, as well as a supermarket, pharmacy - basically all you need!
Last, but not least, Marianne was an amazing host to stay with. She was there to walk us through the apartment, give us her tips for local places to visit & things to see, and when I had a nasty headache while the pharmacy was closed, she went and bought painkillers that she left outside the front door - what a lifesaver!
Our group has traveled to multiple places over the past 10 years years but this is, by far, the best experience we have ever had! Definitely recommend it!