Stayed in January this year with family for one night. Some things were very good especially for the price - staff were helpful and friendly, rooms were decent size and clean.
Some things could improve though - primarily breakfast was not great. Quality of the food was average at best.
Do also be aware that the hotel is out of the central city. Very handy though to the Mercedes and Porsche Museums.
Parking is also a bit of a walk. You can drop your bags off, but then they charge for parking and it is a bit of a walk to get to and from your car.
The hotel is also right beside the football stadium so I would not like the be staying there on a football day (unless of course I was staying to see a football game).