I absolutely can recommend the apartment. It is very spacious and superbly equipped. In addition, you have the possibility to use the roof terrace with a beautiful view of the Acropolis. Especially at night this is really a magnificent view.
The location is excellent as well: all major tourist attractions can be reached on foot and even to go out in the evening, many lively bars and restaurants can be reached within 1-2 minutes.
About Panagiotis himself: He is really an excellent host. Checkin/Checkout time could be coordinated flexibly and uncomplicated with him. For example, I could stay in the apartment until 4 pm without any problems, since my flight was not until the evening.
I will definitely come back :)