I stayed 10 nights.
The location is perfect, 3 min from U-bahn Blisserstraße and 10 min from U-bahn Berlinerstraße. Lidl and Edeka are about 5 min distance. The area is residential and chilled but you can find everything you need.
Christa (who only speaks German) is a very helpful, kind and generous lady.
The room is quite bug, the bed is comfortable and there is a nice big window.
In general I would define my stay as very positive, the only cons is the cleanliness (unfortunately not flawless) and the smell of smoke in the house.
If you are not too picky, for the quality/price I highly recommend it!