I needed to stay at Dusseldorf Airport and the Maritim seemed a good bet. The room was very comfortable though coffee making facilities would have helped. I fancied a swim before breakfast and descended in the dedicated lift to the pool area. It looked very attractive with a good view and pleasant ambience but, surprise, surprise , is unheated. What a disappointment!
The breakfast was excellent if expensive at €23 per person. We enjoyed it very much with wide variety of hot and cold food. Freshly made fried eggs and omelettes were very tasty.
I recommend it as long as a swim is not too important to you.