Stayed for a short sleepover in a 6bed-dorm. Extremely central (5min walk to Station Friedrichstrasse).
Very large cage under the bed which chan be locked with a padlock (you can buy one at the reception), could fit a suitcase.
Arrangement modest, but everything working properly (lights etc.). Very polite receptionist. For very sensible people, try to book a room higher up and away from the window as, in my case, there were people hanging out in front of the hostel. In my case, I slept on the 4th floor (towards the open window) and didn't have a problem.