I stayed in this hotel several times and always came back with pleasure, only this time I had a very disappointing experience. The temperature of the room was ridiculous, I know Stuttgart was experiencing a hot summer, but this was crazy. A 4 start hotel without aircondition, we are in 2015! I assume in the new section of the hotel they have aircondition, so why not let your guests stay there? the hotel certainly wasn't full. Next we opened the tab in the bathroom, first hot water only, even the cold tab gave hot water, after flushing for 5-10 minutes it became cool. This wasn't a one time but basically after an hour the water was hot. Next to that the water was initially brown. The same all applied to my colleagues room across the hall. but at least my room hat a balcony with big doors to ventilate.
Otherwise the hotel is really nice, breakfast was simpler this time, but ok.