Had a very nice experience and stay at Barlachstrasse! Haritha, the host, although could not be present in person, was very thorough and available, trying to make up for her absence.
The room, although small, was very cozy with a large desk and big wardrobe, also ideal for longer stays. A lamp next to the bed is highly recommended, however, which is currently lacking.
The neighborhood and location are very quiet and nice, with the subways reachable in under 10 mins walking.