We stayed overnight for a layover at the Düsseldorf airport. The hotel is clean and efficient and a good option when staying close to the airport to catch an early flight out. Staff are friendly and efficient. We booked a transfer to the airport very early in the morning and the driver was ready at the arranged time, cost was 10 EUR per person, which you pay up front at the reception. Drive time to the airport is 5-10 minutes.
The hotel is located in a business/industrial area and restaurant options in walking distance are limited, the hotel has a bar, but no restaurant that is open for dinner.
Overall, I do highly recommend this hotel when needed a place to stay close to DUS for a flight the next day.