Ellie K.
Yelp
This is a beautiful hotel. It has changed somewhat since becoming a Steigenberger property. I was a guest many years ago when it was the Graf Zeppelin. Each room was decorated differently, which was charming but not so great when you got a room that wasn't to your liking! The modernization is an improvement overall. Some things are unchanged from 20 years ago, but in perfect condition, e.g. two of the classic dining rooms. (There are casual alternatives also.)
Great location, by the main train station. Also, the hotel is within walking distance of nearly everywhere I needed to go in Stuttgart.
On the top floor, there was an indoor pool. In summer, I remember swimming laps, then pausing to look out the large windows, at the green hillsides and vineyards. When I returned in 2015 and 2018, the pool was unchanged! It was well-maintained and very clean.