The NH Dusseldorf City is within walking distance of the main railway station (some 10 minutes). It is spacious and modern styled. My room was moderately spacious although the bathroom (with bath) was a bit small. Good beds. High-speed internet was expensive but, surprisingly, truely high-speed (over 140kbps!).
Breakfast was great, with a wide variety of choices, although no breakfast potatoes or hashbrowns. Also, drinks in the bar were not excessively expensive and staff service was very friendly.
Still, check-in and check-out took too long, even though there were 3 agents at the front desk. Apparently the NH system is slow, since I've had similar experiences at this hotel before, as well as in another NH hotel (in Amsterdam). And, do bring more than one credit card since my VISA did not go through and I had to use my MC.
Good to see a row of taxis waiting at the hotel: and with a major fair going on in Dusseldorf that certainly is a great thing. Value-for-money is excellent. I'm not sure there was a group discount since I did not make the reservation myself, but at € 104 this was definitely a bargain.

The Good: We got a nice warm welcome from the lady checking us in, before taking the glass box lift up the side of the beautifully open atrium, to our room on the 4th floor. The room was reasonably spacious, very clean, and with kitted out with most of what one would expect in a hotel like this. Before heading out, we took time for a drinik in the bar and choose from the cocktail menu. A good option, the cocktails were delightful, and well recommended.

The Bad: We booked through HRS.de and got a deal considerably lower than the advertised rates of nearly €400 per night! At that price, this hotel would be a rip-off. In fact anythinbg over €150 would represent bad value.
There were a couple of annoying things about the hotel, that made me think they took a leave from Ryanairs' book, i.e. - get the customer in, the charge silly prices where possible. Wifi in a business or decent hotel should be included, but not here. A small bottle of still water in the room is €4, ridiculous. Breakfast, though very good, is €19!

Whilst I would stay here again, it won't be my first choice when I go back to Dusseldorf. I fgalls just short of the mark between good service, and good value.

Spending a weekend at Dusseldorf, we booked two nights at this hotel. Staff were very friendly and for breakfast there was plenty of choice. Our room was probably not the most modern, but it was comfortable and delivered everything we needed. Connection to the Altstad is really easy by metro. Recommended for a short stay.

We stayed here because we were going to a concert at the Philipshalle nearby.
Confortable and clean.