The location is very good, in the middle of everything, walking distance from what you want to see in Athens. There is an excellent restaurant in the corner, for breakfast, brunch, lunch or dinner - i've had brunch there every day before I threw myself into the city. Also there is a bakery next door.
Alexander was really helpful and communicative, and last but not least he is very cool, with a good sense of humor. :)
The apartman is more than enough: extremely comfortable bed, quiet, useful balcony, huge window, but you can darken properly.
Safe neighborhood, hot shower, relaxing sleep guaranteed! I highly recommend it. :)