nice location, nice staff, some room limitations
I stayed for several days recently as part of a business trip so that I could visit Beethovenhaus. The hotel is located on a very charming plaza in lovely and historic downtown area for walking, just a 5-minute stroll to Beethovenhaus. That all worked out very well. The Bonn Tourism office is a short walk and you can sign up for tours there. This is an ideal romantic destination (although my wife had to stay behind at the last minute!).
The hotel staff was quite professional and spoke English perfectly. The breakfasts were well prepared. The facilities were all fine and modern.
The only concerns are that the days were warm and, while the room had a large window that could be opened, there was no breeze (no way for air to flow into the room) and no A/C so it was rather warm at times. Also, we had requested a room with a king sized bed. I expected the 'European' configuration (wide) vs. the 'California' (long). Neither was true. The bed was nice and long but as narrow as a US double bed. I don't know how we would have fit on it!