This was the most incredible hotel I ever stayed in. It had the most friendly, helpful, flexible personnel. One of the children with us developed a tooth ache -- Friday evening. While our Hungarian insurance told us to search on the internet, the receptionist of the hotel phoned around Bonn for about 30 min until he found a dentist who accepted us immediately.
The rooms were nice, and tastefully decorated, like the entire hotel. I especially liked the historic travel posters along the staircase.
The breakfast buffet was very good, the plates were filled up continuously.