I enjoyed my stay in Athens: everything was clean, the bathroom was nice, the apartment was well furbished and I enjoyed the balcony. The location is good (especially for what you pay for the whole apartment) and it's very close by the metro station Victoria (and also train station!).
I would recommend to go by metro everywhere you go: especially because you are staying at a very greek/multicultural neighborhood. There are a lot of people on the streets during the night, that can make you feel unsafe. I stayed there as woman alone: nothing dangerous happened and after a couple of days I got used to all the different kind of people walking and talking.
The communications was good with the host (sometimes in Greek and you need to translate it in Google Translate, but ok). The response time is always very fast and they are always helpful. In other reviews you can read difficulties with the key: that's a bit true. The first couple of days I didn't have problems, but in the end I had to try 10-20 times to get in. I don't think they can do something about it (it's not they key I think). So don't worry: I will work in the end. Just try, push and pull the door, use the 2 keys: you will get in very quick.
Remember: You are in Greece. It's European, but not like the western part of Europe. Neighborhoods, people and things are different: a bit indigent. That's part of the culture! You see more of Greece in this neighborhood than in the middle of all the touristic spots.
I really enjoyed my stay: the apartment is nice and clean. That's the most important part. The metro brings you everywhere. I was an amazing place to