Great hostel. Clean, very friendly staff, free very good Wifi.
Everything is very easy and practical. Chek out took me zero minute. Chek in was great: she gives you maps of the city and pieces of advice about where to eat, what to visit, etc.
Breakfast: cereals, bread, jams, butter, honey, fruits, cake, tea, eggs. You can have breakfast whenever you want. It is on the table (in the kitchen) from the night before. Very practical for people leaving early.
Living room + courtyard. Lockers in the room. Enough bathrooms. Close to Syntagma place (10 minutes away on foot). 30 minutes away on foot from the Acropole. I did everything on foot and did not use any public transport (except to the airport).
I would come again.