I visited the hotel for a conference and didn't st...

I visited the hotel for a conference and didn't stay overnight. Overall, the hotel is special due to the concept and its design. However there are some logistical and infrastructural issues. The public bathrooms for the conference guests are hard to find, especially when you are on the wrong side of the atrium. Then the cooling system is not sufficient to cool the main meeting room sufficiently for about 250 guests. The location next to the river Rhine is good, however you have to travel there by car. It is not on the right side of Bonn and its city center.