We stayed for a week and loved walking in the downtown area where there were no cars allowed, just pedestrians and bicyclists. We enjoyed Bonn's attractions, all of which were within easy walking distance of the hotel. There were many cafés, restaurants and even markets very close by.
The WIFI wasn't working at first, but got fixed; breakfast was interesting and delicious; despite the downtown location, the room was very quiet; and the staff were very friendly and attentive.
It is a small room: the shower was too small to be enjoyable, and the twin mattresses together in one bed were not entirely comfortable.
On balance, though, it was a great place!