Very nice, basic place to stay in Berlin. Bedroom and shared bath were very clean and comfortable. Small room, good for 1-2 people who desire a quiet rest in the evening while exploring the city.
Location is GREAT. I was able to walk to many wonderful restaurants and bars both close to Alexanderplatz as well as less-touristy areas. Public transportation is readily available to explore other parts of the city.
Hosts were friendly and responsive.
Notes: No air conditioning, which is typical. There is some noise in the morning from the courtyard and children in the building so don't plan to sleep in. None of this affected my stay. Also, pay close attention to the directions for building location and access. It can be a little confusing if arriving in the evening.
Overall an excellent stay and I would repeat.