The Airbnb is situated in a very rundown office building.
The entrance, hallway was not well maintained, and we were even stuck in the lift once and saw it stuck another time - so please avoid the lift.
Also the lights in several floors weren't working and it felt like a horror movie at night.
Once you get into the actual room/airbnb, it is lovely, clean and spacious.
I was lucky that I was travelling with my partner. I would not have felt safe on my own or with another woman. The area is not the main touristy area and well known for pickpocketing (which we heard about while we were there). It is very central and easy to get places, but that is Athens in general as you can walk everywhere.
The communication with the company who runs the airbnb was good and quick to respond.
Conclusion, if you don't mind spending a bit less, the airbnb itself is lovely. As long as you make sure that you're okay with a lesser area and a rundown building.