When I arrived at 23.30 the front desk staff member was very, very helpful assisting me to find parking in an overful carpark. Top marks.
The hotel is 10 minutes walk and 6 U bahn stops from the historic centre.
Breakfast was very crowded and not very nice food.
I don't mind children, but if you do, be aware that there are LOTS of them in this hotel, at least in high summer.