I stayed at Christian's place for about 6 months and I would have stayed more if I had remembered to extend my stay. While it was a shared apartment I had my privacy and didn't have to interact with anyone. The apartment is located in a nice area and has pretty much everything you need.
Christian is a great guy, extremely helpful. Since I stayed there for a longer time I didn't only experience it first hand but I've seen it with everyone that stayed at his place.
It was also lucky that he speaks English since my German is not that good.
I wish him all the best!