The hotel was spotless despite snowy boots, the free wifi was an added bonus. We opted not to have breakfast and found a local bakery on the go. It is literally next door to an underground stop. My only complaint in the standard rooms there are no tea and coffee making facilities which I missed after coming in from the cold. At night there was a fairly continuous and annoying sound of water filling a cistern. In fairness we always forgot to complain as we were too busy enjoying our time in Berlin. The multiple day passes on public transport are great value for money, we never got a taxi!