Travelled to Berlin in Sept 2022 for the Berlin Marathon. Stayed with Markus and Ewa for 4 nights.
The location of the apartment is very good, about 15 minutes walk to/from the central station (or 5 minutes if you take the bus from the stop opposite the apartment).
Netto supermarket is just accross the street so you can easily buy your food and other daily needs.
Markus and Ewa are great hosts and very helpful. Their home is well furnished, very clean and the kitchen is very well equipped. They basically leave you alone and you are free to come and go, use the refrigerator and other appliances in the kitchen, and cook your own food.
Would love to be back and stay with Markus and Ewa next time.