In general, we really enjoyed our stay, the flat location is perfect (just next to the metro station), the hosts were always available, and the check-in was smooth even though we arrived earlier and needed to leave our bags before checking in.
The flat has two terraces (one small and one huge), the bed is comfy and the AC heat mode saved us even during unexpectedly cold nights. The linen and the towels were super clean too. As this is the only flat on the floor, it was very quiet - really important in a bustling city like Athens.
However, it seemed that the flat was really run down: the kitchen area was dirty (esp. microwaves and stove), decorative shelves were falling down (the hosts told us that the previous guests had damaged something though...), the bathroom really needed deep cleaning. There is a coffee machine and some kind of kettle, but the only kitchen plug was too far from any table or surface to use them properly. Also, one can certainly expect more than one toilet paper roll for one week/two people stay.
Our overall impression, is that this listing (really great value for money by the way!) was used for many years, and after pandemic-hit seasons it has become a bit neglected or just run down compared to the photos.