Annas apartment is a cozy place, well situated in Berlin with easy access to everything needed (e.g. public transport, grocery stores). It was clean and equipped with all accessories you need to survive, so a good set up from where to start exploring Berlin.
We were in 5 and stayed there for a weekend (2 nights). 5 people do fit in the flat however we would not necessarily recommend staying with that many people. The sleeping options are available but at least 2 of them are on foldable mattresses that can only fit one small person and is not the most comfortable option. With fewer people the place is perfectly fine – especially the bed in the bedroom is very comfortable.
The communication with the host was okay. Even if just writing the most necessary, she always answered quickly.