If you are young and are in Berlin to go crazy this place would be suitable as it is full of alternative people and the vibe is quite chaotic. However, don’t expect to get some rest as the key cards constantly stop working and you’ll have to be asking reluctant receptions workers to fix it like a few times a day. In my last day of stay someone checked in the room during the night and obviously ruined everyone’s sleep.
On the on the hand, I must admit hostels great location and cool events that they organise to encourage people meeting each other.