John was very helpful and we had great communication. He lives in the same building and is available and very responsive. I just wanted to ask if they have coffee or should I get it from the grocery store, but before I could finish the sentence John made a call and Dorita (his wife or girlfriend) was knocking on the front door with a bag of coffee. Also, on the last day I was pleasantly surprised by a thoughtful gift.
The apartment is just as described. It is extremely big and spacious and it's located just minutes from Acropolis and Acropoli metro station. Even though it's well located, it's extremely quiet and has a balcony with a view of a backyard with palm, lemon and orange trees. It is equipped with everything you might need.
The Wi-Fi signal is mostly good, but it's quality varies in different parts of the apartment. It went dead once but John resolved it quickly after an SMS. The bed in the living room is OK, but could be more comfortable.
If I come to Athens again, I'd definitely like to stay here again.