Theodoros and Alice were very nice and welcoming. As we arrived very late, almost at midnight, it was very nice that they had prepared some snacks for us to eat at breakfast. They even gave us nice hand-made hats! (may be that's a spoiler, that will ruin surprise for future guests?!)
The apartment is spacious enough for 6 people, it is simple and clean. Location is also good and you can see the Lycabettus hill from the window.
We went to Athens to run a marathon and it was quite important, that finish stadium is not very far - it's about 1 km. Also, metro station is 10 minutes walk away.