This is a great place to stay in Athens and John is a warm and friendly person that's a joy to deal with. We booked John's place because of the reviews we saw and they are all accurate. You couldn't ask for a better located apartment in Athens, a more comfortable home to come back to after spending the day exploring Athens and a nicer friendlier person than John.
I could just relist what all the other reviewers have written about the apartment, John giving him and extra couple of stars etc. but I'd just be repeating what's already been said.
The one thing I will add is that we particularly liked the balcony. Having some breakfast out there in the morning and a quiet drink in the afternoon was a great way to start and end the day.