Birgit's place is located in a quiet residential area on the outskirt of Berlin.
Her place is easily accessible by M2 tram (and the tram stop is only 1-2 min away by walk) and it takes around 20 min to get to Alexanderplatz, where you can transfer to other transport. There is a large supermarket near her place so it is very useful, especially if you are willing to cook yourself.
You rent a whole bungalow with kitchen, private bathroom and bedroom, kept very tidy and clean. The kitchen has basic utensils and spices so I had no problem making my breakfast and dinner. I contacted her a couple of times for some questions (e.g. heating, checkout) and she quickly responded to me.
Birgit is a great host and her place is a great place to stay. Would choose hers again if I visit Berlin in the future.