Brilliant place to stay, exactly what is advertised. Carmen had employed someone to look after the rooms who was very helpful and friendly whenever we needed him. About fifteen minutes from two s-bahn/u-bahn stations (don't get them mixed up).
Near train tracks which didn't disturb us even sleeping with the windows open but if you're sensitive to noise this may be an issue.
The bikes were amazing, but dutch style so no back brake on the handlebars which may result in your girlfriend riding into your behind. You can get everywhere by bike but may end up with a long ride home at the end of the day.
The terrace is gorgeous and actually a good way of meeting people in the other rooms.
Overall an amazing place to stay, will go again if in Berlin.