This apartment is absolutely gorgeous and super cosy. The beds are very comfy, the kitchen is equipped, there are even some small amenities that make a stay extra special (coffee pads, bottle of water and even spa slippers :)). That's super host material.
If you want to be in the heart of the historic city, Kolonaki is probably one of the quietest district.
Communication with the hosts was fast and easy.
It is 10-12 minutes walk to Syntagma Square and 20-24 minutes to the Akropolis museum to give you an idea. We walked most of the time there and that is very convenient.
Highly recommended!