We arrived a bit late on the Friday at Anna's flat. However, she was very understanding and made us feel at home straight away. The flat is exactly as it is on the website. It is very big, convenient and was very clean when we arrived.
The neighbourhood was brilliant, very central for what we were doing and close to a metro station.
I would highly recommend this flat to anyone staying in Berlin. We had no issues with Wi-Fi by the way.
The only small downside was the additional tax we had to pay upon arrival which should maybe be included in booking price in the future but that didn't affect our overall experience.
All in all, an excellent accommodation.