Yvonne is a great host. Generous, kind, considering, and a very interesting person. She is very easy to agree on anything and is very happy to help with anything you might need. Her place is clean, very comfortable, and pretty. It is only around 5 minutes walk from S-Bahn and U-Bahn station and from there you can get anywhere in Berlin, including the airport (it takes around an hour to get to the airport with S-Bahn, but it is cheap and very easy).
I definitely recommend anyone to stay with Yvonne.