I would absolutely 100% recommend this place to stay to anyone in the future.
We stayed at Audrey's for two nights. Audrey was extremely helpful and even messaged us a detailed plan for how to get to the flat from the airport. When we arrived Audrey made sure she was there to welcome us. She was very considerate and provided us with a useful guide to the local area.
The room was quite large and we never felt cramped in it. It was very warm and quiet at night and we had two very peaceful nights sleeps. We also had our own separate door in and out of the flat which was useful because it meant we didn't have to worry about waking anyone up.
To get to central Berlin (with all the museums) it was only about a 5 minute walk and a 15 minute train. It might sound far but it was really quick and easy.
We ate at two places that I would recommend to future visitors: BurgerMeister (close to East Side Gallery) and Nosh (close to the flat). Both were really nice and not too expensive.
In summary, Audrey's place is lovely and perfect for anyone to visit Berlin. She was a lovely host and we hope to visit her again in the future.