I stayed at Christos‘s place for three nights. Over all i had a good time there: location is good, close too shops local cafes and restaurants; and walking distance to main attractions of the city (about 30‘ walking to the Plaka). Christos is very kind and nice.
I felt very welcome and safe as if i was staying at my elder brother‘s house :)
I like the room with balcony for reading/ enjoying some tea. The room was clean and had an air conditioner , which is good in summer.
If you are not too sensitive with noise from the streets at night, this is a recommendable stay in Athens city center.