Gernot is a courteous and friendly host. As coveredd by all the other reviews, this is an ideal stay for one person if you do not mind being in a shared apartment with Gernot. The personal room is indeed small, though if you are accustomed to tight living spaces this should not be a problem.
It is clear that Gernot has had many wonderful experiences with his travels, which is reflected in the decor around the apartment. If you are extroverted this will make for easy conversation.
My only issue was the mattress which was a bit uncomfortable. I do suffer from chronic pain and so I will be bothered by more mattresses than not. Other than that I am very grateful to have stayed with Gernot and wish him the best!