I stayed at Christos' place for four weeks in September and can not recommend this place highly enough.
The flat is located in central Athens, and you can reach the Acropolis in less than an hour on foot or use the metro (there are two metro stations less than a 10 min walk away), although I recommend to grab a coffee and a fresh pastry from one of the bakeries and take the opportunity to explore the less touristy side of Athens a bit.
There is a supermarket directly across the street where you can get any groceries you need, a laundromat not even 5 min down the road, and several cafes, bakeries, and restaurants nearby.
The flat is very cute and spacious (especially if you are travelling alone) and not only has the usual amenities but also a balcony where you can enjoy a cup of coffee or a glass of wine. Everything was very clean and fresh towels and bead linens were available throughout my stay. If you want to cook (as I did), everything necessary is provided and it's nice to have a living room in addition to the bedroom to relax on the couch and watch a movie.
Christos' mother greeted me for the check-in after a delayed arrival, showed me around, and informed me about all the important locations around (such as the supermarket), I felt very welcome. Not only is she available if there are any questions/problems, but Christos and his sister Marva always replied within the hour to any message I sent. They gave me lots of amazing recommendations for places to check out in Athens, and I am very grateful for their help throughout the stay. They were also very flexible with check-out as I had booked a late flight and did not have to leave for the airport before the late afternoon.
If you are travelling to Athens and are looking for a place to stay, this apartment is a great choice!
For me it was the ideal locations (central but not full with tourists and souvenir shops), it has amazing hosts, the apartment is very cute, and all together was the perfect spot for my stay.
Thanks a lot!