We had a great time with my family at Christian's place. All beds are very comfortable - I have seen the complains on the waterbed but I can confirm there is either no more waterbed or it was as comfortable as any other :) I have also seen complains on the occupancy of the 3rd floor. It was no problem, hardly noticeable, and the whole flat feels safe and yours. The neighbourhood is very peaceful, but everything is close and easy to reach. The small private garden was great for the kids. Also, the communication with Christian was easy and his responses were immediate, even in the late hours. All in all, great experience and a very pleasant stay.