Keramos is a perfect place to stay in order to experience Athens! It's right by the M3 metro stop going to the airport, and a 20 minute walk to all the landmarks in Athens. The apartment is far enough from the city hub that it's quiet at night, but there are still many restaurants and sights close by, and the city center is close enough that we never needed to use public transport of taxis to reach it. It also had all the kitchen amenities that you could need, a cute little outdoor seating area, a very comfortable bed, and the host was very accommodating by giving us an earlier check-in and letting us store our luggage after we checked out.
In short, a perfect place to stay in Athens and we hope to be able to stay there again.