The rooms were tidy, the staff reasonably pleasant, and the location, while not perfect, is very easy to get to the main sight seeing places of Düsseldorf via bus and U lines (all 2 minutes walk from the hotel). The buffet continental breakfast has a good selection of meat and cheese too.
We didn't get to stay fully due to a family bereavement, and we were hoping to get a partial refund, we got 10% due to a misunderstanding of the small print (it said if we do not turn up we get a refund minus 10% for fees, they took this as if you do turn up but leave early you get a refund of 10% on the days not used). I will admit this was a little confusing but they did give us 20 euros back which is better than nothing.