Check-in went smooth but we couldn't check-in before 18:00 so we had to take our luggages with us around Berlin.
Sabine was very friendly and helpful.
Her place was nice and VERY clean, same thing with our small private toilette. She provided us towels and toiletries.
Her place was centrally located and well served by public transportation. It's also close to a street where you can find a lot of restaurants and bars, very convenient if you're tired and you don't want to go too far.
Negative aspects:
The room's window is facing the playground of a school so from 9 to 10 o'clock you can hear the kids even if your window is close.
You can also here the noise when someone closes the door or lock It.
If you leave your window slightly open throughout the day you might find your room with marijuana/cannabis odor when you come back later. Sabine told us that it's because of some neighbour.
The odor was very strong as if someone smoked inside our room in fact you could smell it even in the pillows, fortunately we had to deal with the odor only on our last night.
So don't leave your window open! ;)
I recommend her place though.