If you come to Berlin for a couple of days. This is one of the best options. Although the accommodation is a bit far from the city centre (20 minutes walk to the station) and another 20 minutes by train, it is a very private, comfortable and safe street. Mario is one of the best hosts I have ever met. He is always willing to help you with whatever you need and he is very familiar with you, he tries to make you feel at home. I highly recommend the place.