Hostel is as described, it's nothing fancy but it does the job. However, the staff are truly excellent. When I arrived they were having some trouble with the key cards and was told that mine might not work once I got to my room (three floors up by stairs). I mentioned casually that I have a bad knee so I hoped that it would work, and hobbled upstairs to the room. The card didn't work, but thankfully the girl on reception followed me up and fixed it for me without me having to come back down, which was really nice of her. Didn't catch her name but she was from Koln. The other members of staff I interacted with were also great.
Most importantly, the wifi was good. And free tea and coffee always a plus too!