We are staying in a place called Stage 47, which is more boutique like.. Studios look nice and the feedback aint too bad. Were travelling to Dusseldorf in May and found the hotel prices to be massive as were travelling in conference season...

http://www.booking.com/hotel/de/the-...&lang=en&tab=2

http://www.tripadvisor.com/Hotel_Rev...estphalia.html