The apartment is really nice. It's located very good, the decoration is beautiful and you can notice Yiannis is concerned about everything. His mother received and showed us we had water, coffee and some other stuff for our stay.
There are plenty of nice places to eat around and you are only 4 blocks away from Monastirasky square and 10 min from Syntagma.
We stayed there just for 2 days (Saturday and Sunday) and both days we had problems with hot water. We turned the boiler on hours before taking a bath but hot water only lasted both days for around 10 mins. The second problem we had is that Saturday night, being located so centrally, it was really noisy and also it was noisy Sunday Morning because of the street market, but it is understandable when you are staying in the central area. Our third and really big problem is that there isn't darkness in the room, as the curtains are really light and not the blackout that stop sunlight from coming in, so imagine you will receive it from 630 am.
The place is amazing and we really like its atmosphere but in order to come back we would need to fix the hot water and curtains.