The hotel is modern, and I really liked the online check-in. The virtual key is also very handy, as you don't need to worry about carrying a physical key.
The restaurant on the ground floor is very nice, with tasty food and drinks, and the staff are also very friendly.
The only negative point is the issue with the shower, which clearly hasn't been resolved yet. Just to be fair, I want to mention that it's only the water temperature that changes suddenly — but that's all. The bathroom is very clean, and the amenities are great.
I would definitely book again when returning to Stuttgart in the future.