Being a frequent Airbnb-user, I recognize quality! And I surely did at Eleni's place. The apartment is very spacious and clean, and Eleni is a wonderful hostess who will help you with everything which is in her power. The apartment has a very nice terras, without a view but with privacy, nobody can see yu sit on the balcony. Perfect place to have breakfast and your morning coffee.
The location is perfect, on walking distance from a nice street full of bars and restaurants where locals come! All the tourist attractions are about 20 minute walk from Eleni's place. If you have no problems with walking (it is somewhat steep here and there), this is the perfect place (btw taxi's are very cheap in Athens).
If you have trouble walking: Eleni's apartment is on the top-floor, you have to climb a narrow outdoor stair, so keep this in mind....
I highly recommend Eleni's apartment "sunny attick".