Toni's place was great!
It was really easy to check in; he sent us detailed info about self checking in and also indications regarding how to reach the apartment from the airport.
With his help we manged to reach the apartment without incidents although it was a a big strike in Athens on the day of our arrival.
Apartment is right across the street from Petralona station (2 metro stations to Monastiraki).
The place looks exactly like in the pictures.
Note:
We have't used the iron, the air conditioner and all the kitchen appliances (we only used sink and fridge) .
If we return to Athens we would choose Toni's place again.