Two other people and I stayed just for one night at Hostel 199. On our arrival David came very punctually to give us the keys and after having done a tour of the structure he suggested us on how to visit the city.
The accommodation is not far from Alexanderplatz, as well as from other attractions of the city, it is very well connected: you can take the M10 (a few stops away) and the bus number 200.
The room was clean, spacious and so was the bathroom; the beds were comfortable.
I recommend! 😊