I attend the UN Climate meetings in Bonn each year, and have stayed in Bonn and in small towns on both sides of the Rhein, to the south of the city. All places except one have been satisfactory, but this one stands out as special. The aesthetics are simple but pleasing. My room was spacious, especially the bathroom, though this is a renovation project and all rooms may not all be cut to the same size and shape. Everything worked. Even with a shared inner courtyard where neighboring voices could sometimes be heard, the place was still and quiet. It is a short walk to the regional train stop with good service to Bonn. The town truly features the river, and the meaning of it is present to take-in, not by explanation but by what you can see for yourself and the way people are using it in their lives.
I'm sure many have said the breakfast is wonderful. But you need to experience that for yourself. I am reluctant to praise this place as much as it deserves, because I would like to return and hope rooms will be available and at the very reasonable price.