This hotel had friendly, English-speaking staff at the desk (although sometimes busy in another room, so you had to ring the bell occasionally). Room for a single person had a single bed, space was small, spare and darkish, but clean. Bathroom also plain and clean. Not an American or international experience, it is particularly old-fashionedly German in its spare style.
But free wifi in the room, not just in the lobby. And a free, fulsome German- style breakfast: meat, cheese, muesli, breads, eggs, choices of teas and coffee, fruit.
It's across from a park, so it's quiet, but a minute away from the subway and only a stop away from the train station. You could walk 2 minutes and you cross under the old wall and could walk along a river path to the old town. 15 minutes walk away from the old part of downtown, but without tourists and noise.