Marley's apartment is located very well in Berlin with the underground right outside the door.
We stayed for two weeks and found it very comfortable. We did miss not having a microwave oven to use rather than having to use the full oven. Save on electricity too using a microwave.
There is a lift that takes you up to the 5th floor and then an outside stairs leading to the apartment - going in the back way rather than the front door. Works well when you understand the layout of the entry. Lift is great to have available as it's a long way up to the 5th floor. The Uban is just outside the door which makes access to all parts of Berlin very easy.
We found Marley and her brother very attentive to questions and request.
We will certainly be back again and again.