The average temp in Dusseldorf during my stay at the hotel was 94F. The hotel has no air conditioning, most of the hotels in Europe/Germany do not have air conditioning. Not an issue in the past. This year it was. There was no relief from the heat. The staff did their best to provide fans for the rooms, drinks and some comfort in the lobby, there was a good draft.
It was my first stay and I would go back considering the weather. The Hotel is centrally located, within minutes to the Rhein, Koenigs Allee, and Altstadt.
The breakfast, a wide range of food, was inviting and the room on the lower floor, a welcome "cool" change from the heat.