I just finished staying in room 2A in this 4 unit hostel-style airbnb for a total of 2 months. I have nothing but great things to say about Berlin as a host! A total of 6 different visitors rotated through the airbnb during the duration of my stay, and all were respectful and generally in the airbnb for work related reasons. I have no complaints about the place, and recommend the place for any work visitors or those looking for a several week stay in the city.
Apartment 2A in particular, I can echo is very quiet (off the street), and it is nice having your own bathroom. Berlin responded to any problems quickly and texted us to let us know when a new member was leaving or entering the apartment. There is no living room/tv, and the kitchen is quite small as shown, but all necessary utensils are provided (cleaning supplies, silverware, dishes, pans, etc., and everyone was respectful of working to keep the apartment clean.