The rooms at this hotel are really nice with a very comfortable bed. They have a really cool aquarium which adds an edge to the hotel. The standard on the room service food is really good, and service level pretty good (for germany at least). I have a Carlson Club gold card, and they do not seem to give you anything extra. I have stayed here 4 times now, and never got anything (no upgrade, no breakfast included etc etc). However, it is a very nice hotel, and I will continue to stay here as it is good value for money.