We enjoyed our stay and everything went fine. The place is well connected to the city and the neighbourhood is quite vivid. The place is at street level but not too much noise coming from outside. When we arrived (late Sep season) it was quite cold inside, something like 17-18 degrees, but the heating radiators saved the 2nd and 3rd night.
This was a business trip, for two guys, and we think the setting worked well. Bathroom is next to the other beds (located in the living room area) so I had to sneak in without disturbing my colleague too much. I think the setup would work for a small family too.
All in all, it's nice to have an AirBnb bridgehead in Berlin now. Hope to visit this exciting city again in the near future.