I would recommend this apartment if you want to visit Athens.
It's modern and you have everything you need inclusing washing machine and where to dry clothes, ideal if you want to stay for a long period.
The position is good, you can reach Acropolis area in around 20 min if you want to walk a bit.
The area looks safe and there are supermarkets, cafes and a even bakery/restaurant (Bread Factory) that works 24h
This BnB is definetely a good ratio between quality and price!