The place is excellently located in the heart of eastern Berlin. The place is spacious and also very quiet and Stella is very helpful and responsive. The location is also stumbling distance to most of the major nightclubs such as Berghain, Watergate, etc if you are interested in attending those venues.
One of the bedrooms is much smaller than the other one. So if you are going with a group of people, best to divide up expectations about this ahead of time. However both beds were very comfortable and clean, and the location is very quiet so this didn't pose a problem at all for us.