We found the evening receptionists were welcoming, friendly and very helpful. Could not fault them. Did not really interact with morning receptionists. Breakfast was okay, staff seemed friendly.
As for the room cleaners, well, that is a different matter. Coffee and milk never replaced, although reception did supply more upon request. The coffee mugs were never washed out each day so we rinsed them out ourselves. One day came back to find they had only left us hand towels, no good after having a shower! Shower gel ran out and was not replaced. Under the sink counter we found a bag full of rubbish, it was still there when we left so was missed for more than 7 days as that was how long we stayed. Are they treating the job as easy money for little work.
Out of the three hotels in Dusseldorf that we have stayed in, this is by far the worst. Won't be using again.