As mentioned by other reviewers before, the flat is very well-located, a few metro/tram stations away from the historical centre of Berlin. Everything was great, the flat was very comfortable, fast wifi, good heating, nice decoration. We came with our one-year old daughter and Britta provided a highchair as well as a baby cot. So that was very good for us.
There is a great organic supermarket as well as a REWE close to SenefelderPlatz U-bahn station.
Overall, we highly recommend this flat.