We stayed at the City Hotel when we visited Stuttgart to enjoy Canstatter Wasen. We were able to get their quickly via train, but were able to enjoy being a bit further away in the evening.
The hotel was clean and comfortable, with a private balcony that you could kick back and enjoy the Stuttgart skyline drinking a beer or wine from the in-room bar (which was VERY reasonably priced, unlike most minibars). The beds were comfortable, and the bathroom was sparkling clean. The breakfast included with the stay was also excellent, and the breakfast room is BEAUTIFUL.