It is a modern building around harbor area just 15-20 minutes on foot, from Dusseldorf old town.
It is nice to walk across the harbor on summer time.
We made a reservation for 3 adults at "Innside lifestyle suite". Actually this suite is two double rooms with two bathrooms and two double beds. We stayed at 10th floor with a great view (even from the toilet..!!! )and opened windows around.
Reception was great and all the service also. Breakfast was o.k.
The only minus was the expensive open parking (16.40 Euro per day) just across the street.