Quiet and clean. Most of all: a listed monument, with plenty of antiques wherever you look. Be it the ceilings, furniture, you name it.
It is located in Bad Godesberg, in a small and very quiet street. There are many other old houses around.
Downside? Not really, when one considers how difficult it must be to keep everything up 100%, and still stick to the old style.
Potential for improvement? The included breakfast. I didn't really feel 'at home' there. The breakfast room is nice, but for a nice house it could have been more cozy, and special.
Overall, a recommendation, though!