This is a quite small room however I would recommend it for its magnificent location. The neighborhood is amazing, full of bars and restaurants and walking distance from all major attractions of Athens. It also has air conditioning what really helps during the summer.
The only inconvenience is that the showers and bathrooms are shared in a hostel-style with the guests of the other 4 rooms. However, they keep all the common areas very clean what really makes a difference.
Nasis is also a very kind host always willing to help and assist in anything you need.