The proximity to the Neanderthal museum, the basement swimming pool and sauna, good breakfast buffet.
No elevator; the fact that we got a smoking room although we applied for a non-smoking room explicitly, on our immediate protest we were told that this was because of our late arrival (9.30pm, about which we informed the hotel 4 hours before, which they then replied with "no problem").
Free internet, quiet surrounding, Sauna, small swimmingpool, good breakfast, modern bathroom
Convienent to public transportation into Dusseldorf. Bus #780 took us into the city in 40 minutes. Clean hotel in a country-like setting.
No air conditioning.