We enjoyed our stay at Ksenia's appartment. The neighborhood was great (artists, bars, fine restaurants...), even if it was not near the Acropolis and the historic center (we made everything by foot, around 20 minutes). But you are close to the east of the city : stadium, Zeus Temple etc. The advantage is that the area is more quiet than the city center.
About the appartment, it was a little cold at night and not very luminous but it's an advantage during summer. The little court is a +. We can do a laundry (beware, it can take a long time for clothes to be dry). The kitchen and the shower were fine. There is everything that you need for a pleasant stay in the city ! Thank you for your hospitality :)