Hotel was pretty expensive, although we did go during a large show (Spieletage).
Cons:
Room was pretty hot and had no aircon (despite being told it was included).
Room very noisy on front side of hotel - window seals were a bit perished, letting in lots of road noise.
Wifi was awful, very slow and frequent drop outs.
Bar prices extremely high (€3 soft drink), as was the price of breakfast (€20).
Car park spaces quite tight.
Positive:
Staff excellent and more than happy to help.
Location good, near to the u-bahn and Essen town center.
Room very clean and tidy each day - bathroom spotless.
Overall; it was a positive stay, with excellent staff, but could have been cheaper (and I'd complain less) or the stuff around the edges improved for the price.