Martina and Charlottes place is on the 3rd floor of an apartment block, it has two singles in a separate room and a queen bed in the living space, not so much a problem if you are out travelling all day. The rooms are spotless and the flat is provisioned with clean towels
The local area is packed with bars and restaurants so there is plenty of choices to eat, drink and while the evening away. It is a two minute walk to the nearest U-Bahn and once on the U-Bahn 10 minutes to Alexanderplatz, the shopping areas of the old West Berlin or the area around Schlesisches Tor, again with many places to eat and drink.
The Flat is well provisioned with amenities if you want to eat in, the shower is great and the beds are very comfortable. Of a night despite there being bars on the street it was relatively quiet and didn't disturb sleep, even with the windows open.
I would recommend the apartment to others and I would definitely stay there again.