This is a great stay. The apartment looks like it has been renovated. Everything is relatively new and modern. George has provided pretty much everything you might need in an apartment: pots and pans, dishes and silverware, towels, microwave, espresso machine, lots of hangers. This doesn't seem to be an Airbnb that someone lives in when it's not rented. It's more like a hotel room. There is even one of those cards attached to the keys that you have to put in a slot to turn on the electricity.
The neighborhood doesn't look like much, but many Athens neighborhoods don't look like much. However, I never felt unsafe. It had a very "neighborhood" feel to it. Locals were walking around at all times of day. It was about a 8 minute walk to a Metro station. And within a minute walk there was a little walking street with lots of restaurants. There were also several small groceries close by, as well as a laundromat.
A couple of comments that surprised me that might be more applicable to European Airbnbs in general than to this place in specific:
The apartment listed a washer and "dryer". It turns out this is a single device that did both functions. However, it's not a "dryer" by USA standards. It just spin dries. Honestly, the clothes were as wet as what comes out of my washer at home. So you are still going to be hang drying your clothes. I've seen these devices listed on many Airbnbs in Europe.
Lastly, the evening before I left George sent me an exit message with check out instructions. He warned me to check that the front door was locked. I didn't understand what he was trying to say. Turns out that they lock the outer door overnight and you need your key to get out of the building. So I efficiently left the keys on the kitchen table, shut the apartment door behind me, and was locked between two doors. At 05:00. Just a little snafu, but I think this is more of a safety concern. If the smoke detector had gone off in the middle of the night, I wouldn't have thought that I needed my keys to escape. I'm sure that this is a common practice in many parts of the world of which I was not aware.