I was here in 2006 and this weekend again with my wife and 12 y old daughter. The family room (or should we call it suite) we had was really enormous. It had a large living room (with bed for my daughter) with kitchen and microwave and a very nice bar in the refrigerator.
Also the bar in the hotel entrance is very cosy, and we had a very nice staff there as well. Very relaxing after a long drive.
The hotel has a lot of spa facilities, which we didn't use (until now :-)), but which look very promising. Also the saune is something to discover.
We sure are going back to this hotel, as early as December already.
You are a little bit outside of Düsseldorf, but it is a great location next to the A3 and ideally to have a great walk or bikeride.

My husband and I stayed at the beautiful Mercure Erkrath hotel in June 2004 . We were on a travel business to Dusseldorf , but we preferred to stay in Erkrath because it is a nice village with tasty food and friendly people . The hotel although it has all the modern facilities is romantic , with its beautiful garden .The rooms are spacious ( we hoped that the price included breakfast , but it didn't , as , unfortunately , all the Accor hotels ).
Erkrath is close to Neandertal , where you can visit the museum of the homo sapiens . Near the hotel starts a path crossing the woods , where horses live.A very pleasant stay.