The host was diligent in making sure I could arrive late (after a flight arrival at Schoneweide at 22.30hrs, and so arrival at the flat after midnight.
However, another tenant let me in, which avoided going to no. 47 Sophie Charlottenstr. to pick up the key.
The ground floor premises are basic, but very clean. There is a small bathroom, with a tiny shower behind a curtain, and a small kitchen.
There is no lounge.
Despite my room being on the roadward side, it was not noisy at night.
However, one could hear other guests (and their TV) late at night which was not so agreeable.