I will definitely be back to Athens and I will definitely check to see if this flat is available when I do. Spotlessly clean, very well equipped, excellent location with many mini markets and restaurants just one street away, and being just an approx half hour walk from Syntagma Sq.
Ioannis is helpful and attentive without being pushy or intrusive, living very locally so available to greet at check in or to help out if there's a problem.
The only slight negative is that the shower space is somewhat of a tight squeeze. it looks huge in the photo but the little trough that you stand in doesn't cover a big area so if you are generously proportioned you may find yourself wiggling about a bit to avoid the walls/shower curtain - but how much time out of your day do you spend in the shower?