Paying 50E/person a night to climb those terrible stais with a lot of luggage was not good at all. The main building has an elevator so the others should have one too. It would be passable for a 20 euro cheap hostel.
Too many stairs, way too many... Staff was helpful, most stuff was OK, but I didn't really dig the atmosphere. Maybe I just wasn't in the right mood.
One of the best hostels I've stayed. The neighborhood is very nice with 2 close subway stations that will take you mostly everywhere. Rooms were clean, the bathroom had a lot of space and the staff was always helpful.