Great location, value, and host.
This is a very nice apartment in a very convenient spot. We have spent a lot of time visiting in this area of Athens and were still surprised with how much more convenient this apartment was than places we have stayed that are just a few blocks deeper into Metz.
You can see the bus stop out of the window, as well as a bakery and coffee shop. Our favorite taverna in Athens and one of our favorites in all of Greece, "Olympion" is a 2 minute walk, so good food is never far away.
The Acropolis was a 5 minute brisk walk or a 10 minute leisurely walk. Just a tip for your planning, if you are using mapping programs to figure out which apartment is the nearest to the Acropolis, putting in the Acropolis as your destination gives you walking times to the TOP of the Acropolis within the site, not to the entrance. There are several entrances, but the one closest to this apartment is beside the Acropolis Museum, and is really the best place to start.
Kostantinas was a great host, always available, and he lives right there in the building, so he knows the area very well.
Some reviews remarked on noise from the intersection below, but we did not find it offensive or even noticeable after a few minutes in the apartment. It is just background city noise and wasn't objectionable in any way.
Great place to stay.