Very comfortable stay!
The host always kept in touch with me to ask whether I needed something, what time I was going to arrive, and so on. The kitchen was well equipped. Especially I loved that there was the oven, so I could heat pies and some ready-made meals from supermarket.
When it comes to the security, you might be careful a little bit because the area (Omonia and Viktoria) is relatively dangerous. Still, I could feel safe there since the apartment was located at a big street and there were always people walking.