It is a wonderful appartment in a very very good location that I would highly recommend.
The place is near the Philopapos hill (with observatory on top)- a great place to walk/see the sun rise in the morning. Nearby is a street with excellent local restaurants- a great alternative to the very tourist-filled spots nearer the Acropolis. Speaking of, it is 5 minutes walk from the Acropolis, forum (roman and greek) and various museums. It felt very safe even at night and there are supermarkets, a bakery, pharmacy and metro stops very near by!
We were 3 people and the appartment was comfortable and spacious with this amount. A highlight is the roof terrace which looks out on the Philopapos hill and catches the sun- a very beautiful spot for dinner and drinks in the evening.
Nikos was brilliant in helping us throughout the stay. He gave us tips on arrival about where best to eat and sent through many details about the various museums of Athens.
A 10/10 stay!!