The Steigenberger Berlin is the largest of the three hotels but not the most comfortable.The rooms do not have bathrooms but there are showers in the corridors.For those who do not mind sharing the cheapest rate is for a bed in a dormitory.The Hotel Ambassador Berlin is not more expensive than the Steigenberger but the extra level of comfort is worth the higher price.Room rates at the Hotel Brandenburger Hof are about the same as at the Concept Hotel.None of these hotels is as well equipped as Steigenberger Berlin,which is the most suitable for business visitors.