The hostel itself is not so bad, the people are very nice, it is not very far from the city centre and the price is reasonable (if you book early, otherwise it can be very overpriced). However, there is a catch. You will not be able to sleep before one o clock in the night or after six o clock in the morning. This is because of the noise. It is probably the building plan, that the walls are thin and that the doors keep out no noise but what is happening outside of your room, is as if its happening next to your bed. Baggage is being dragged down the stairs, yes, dragged, if this makes sense and is coming banging down the stairs. People are shouting. Extraordinary. The nights, again the same thing from people that people coming in and also from the disco in the basement that might be functioning. Unbelievable.
If, on the other hand you are lucky and you get a room at the end of the corridor, far from the staircase from where all noise comes, it is fine.
So depends on what kind of an οwl you are.