I stayed at Katrin's for two weeks. The room is exactly as pictured and described. Everything is very clean and Katrin's housemates were friendly and helpful. It is very well located in a cool part of Berlin and very close to the U Bahn. It is a great base to explore Berlin as its very easy to get around and there is a lot to do and see right on your doorstep! Katrin responded very promptly to my emails and was helpful and thoughtful in her responses - this helped me a lot! I recommend staying here.