The hostel is clean and perfectly located. It has many useful facilities. It is opened 24h so keep in kind you can have new guests entering the room in the middle of the night, like mine, loud and unrespectful to others. Also one more note - free lockers do not include the free lockpads.
My biggest dissapointment is the contact with the hostel. I have lost my camera, I informed a woman at the reception that was very sweet and took all my contact information. Since then dead silence. I am sending emails, messages on airbnb and facebook. I even asked my friend from Berlin to go and check on her own, but she was asked to come another day after the cleaning. She came back but the person at the desk was not informed about the whole situation and was not helpful. Till today, 4 days after I checked out of the hostel, I still do not know if my camera has been found.