Stayed here with a wedding party. Our room had no view but was clean and reasonably spacious with a reasonable sized bath. One friend had a similar sized room with tiny, shower-only bath but it did have a Rhine view. Had a very nice breakfast on covered patio overlooking the Rhine. Hotel is within walking distance of city center but rather of a hike from the train station if you're toting luggage -- a taxi cost 6.5 euro.The hotel was a bit pricey but truly a 4-star. Staff was all nice. Internet is free in the lobby if you use the hotel laptop.

We visited this year to see the Bonn and Koln Christmas markets and thoroughly enjoyed our stay. We drove over from the UK and this was one of the few Bonn hotels that had a secure car park, albeit at a price (€15 per day).

To reiterate what the others have said it is a well-run, clean and well-resourced hotel with very efficient and friendly staff and an excellent breakfast (can’t speak for the restaurant as we ate in town every day). Accommodation and public areas a little dated but otherwise no issues at all - a pleasure to stay.

We have stayed here before and we will return in July with the children (all adults now) to stay again. The location next to the Rhine and at the head of the museum mile (close to the tube) is perfect and the short walk into town will not stress anyone.

A bit drab from the outside, but welcoming lobby opening out onto a huge terrace and garden overlooking the Rhine. Receptionists and restaurant staff extremely friendly and helpful. Large room and bathroom with two sinks, a tub and a separate shower stall; toiletries a joke (a bar of soap and a shampoo dispenser in the shower). Furniture (and tv) a bit outdated, but comfy beds and huge windows overlooking Hofgarten park. Decent breakfast in a restaurant overlooking the Rhine, room service good and quick. A four-minute walk to the nearest tube station, 7 minutes to the main square, 10 minutes to the train station. I booked through onhotels.com, which I had not heard of before, and got a fantastic deal, paying € 66 (including breakfast) instead of their competitors' lowest price of € 99. Will definitely stay there again.

We had a nice stay at this hotel last weekend. Reception was very professional and helpful. We had a room with Rhine-view. The view was very nice, the room clean and spacious, only the bathroom was less than expected.
Breakfast was wonderful, plenty of choice, everything very fresh and staff super-friendly.
We had diner at Oliveto's which was nice but not all courses were equally good. E.g. the first course (salad) was just a handful of lettuce with (too much) balsamic vinegar on it. Nothing refined about it. Other courses were tasteful but nothing spectacular or above standard.
Conclusion : a fine hotel with excellent location. The restaurant is not a must! Oh yes, and no sports facilities (swimming pool, fitness), something that a hotel of this standard should have.