The location and the style of the apartment is great. We had a very good time there. Also the rooftop (which is a common space in the building) offers fantastic views over the city and Acropolis.
There are some details which made me given only 4 instead of 5 stars: the cushions on the couch are dirty and need replacement. The floor wasn’t clean (white socks were dirty after seconds). In the coffee machine has been old capsules. And why only one key for a flat that can host up to 8 people? These details decide between good and great ;)
Other than that the flat is highly recommended.