We had a great time in this flat. The view of the sky from the windows over the bed was great. The WiFi speed was good. The appliances all worked well. It was a nice small studio. We kept thinking how nice it would be to live in this flat.
The downsides were really just the shower water temperature, and the walk up. The shower didn't give a consistent water temperature. Other friends in a hotel had the same problem. And it's a top floor flat on a walk up. Other friends in a different Airbnb had the same thing. All this is to say: when visiting Berlin, just expect these two things.
If you're looking for organic/vegan food, there's a BioCompany just a ten minute walk north on Hermannstraße.