We really enjoyed our stay at Maximilian's B&B. The flat is in an old- style building in Moabit with squeaky floors and old doors but the facilities are quite nice. At night the neighborhood and the flat itself was very quiet as the sound insulation is good. Communication with the host was fine although I received no answer to my request for a late checkout. Overall, if I needed a quiet place to stay at in Moabit for many people (~6 people), I would come back.