Eleni's apartment is located right in the heart of the city. It's a quick 5 minute walk to the Acropolis, hundreds of restaurants, and the Metro station - hard to beat that for convenience! It's also less than 15 minutes walk to Plaka, the shipping district.
We took the Metro from the airport and reached the apartment without any issues based on Eleni's excellent directions (the Metro is an 18euro round trip per person compared to 40eruo one way by taxi).
The apartment itself is very clean and comfortable. We appreciated Eleni's extra touches like a welcome drink, house slippers and toiletries.
The one watch out is that if you're a big person (over 6ft), you might find the shower too tight. But based on the other Airbnbs we're staying at on this trip, it seems common to have tiny showers in Greece.
Overall, we had a very comfortable stay and would highly recommend this apartment and Eleni as a host!