I stayed in this lovely room for a couple of days and it was a great experience. I wasn't sure what to expect from the shared facilities but everything was very clean (I believe cleaned daily), the rooms were tidy and clean, and the location was good as well. The room is not super cozy but the bed is good and if you are in Berlin for a buisness trip on a budget it's completely sufficient. The wifi is fast as well!
Although I didn't mean Parwana personally, she was very nice throughout out communication and the check-in system makes things very uncomplicated.
In sum: Would certainly book again every time!