I recommend this Airbnb.
Hans is a very nice guy ! He came at the tube station when we arrived with our 4 suitcases. He took time to explain how to enjoy your trip. We tried a good German restaurant thanks his advices.
The accommodation is very comfortable and proper. There are an oven and a dishwasher in the kitchen, it's useful.
Bedrooms are very comfortable and spacious. Bed sheets are included
Towels and wash gloves are included.
Furthermore there are 4 bicycles available to go at the tube station. It takes 5 minutes by bicycle. By foot it takes 20 minutes. We won lot of time and there are a lot of cycle lanes. Berlin is a safety town.