This is truly a fantastic Airbnb. The hosts were amazingly communicative from the moment we booked several months prior to our trip all the way through to the moment we checked out. Harald was out of town the day we arrived but his friend graciously waited at the apartment until we arrived from the airport so that he could let us in and show us around.
The space is just wonderful -- spacious, tastefully decorated, spotlessly clean, fully stocked with the necessary amenities (toilet paper, bath towels, linens, pillows, etc). There is a bedroom with a queen bed that was perfect for us as a couple. The living room area has three huge (and comfortable!) sofas that would each comfortably sleep a person if needed. Even the floors are marble and beautiful. We spent 10 days here in the dead of winter (it even snowed during our visit!) and the heating system worked perfectly for us. There are really nice blackout blinds in the bedroom and kitchen that will make those rooms pitch black in the mid-day if you want to sleep in!
However, the best part of this Airbnb is the MASSIVE outdoor terrace. It is truly magnificent, with epics views of Athens and a direct line of sight to the Lycabettus Hill. There's really nothing like sitting on the terrace having your coffee and baguette every morning as the sun rises over Athens. We stayed in the winter time but we still spent a lot of time on the terrace, so I can only imagine how wonderful the terrace will be in the summertime!
I wish I could recommend this place to everyone, but then I'd worry it would be booked when I want to visit Athens again in the summer! Exceptional!