Sam Z.
Yelp
Breakfast - 5 stars, all you can eat, and you don't have to be staying at the hotel to eat there. IIRC it was roughly $24. Only complaint was that there was no decaf coffee, and it gets pretty crowded if you don't go early. But tons of options - muesli of various kinds, many kinds of pastries, bread, plus there's fruit, all kinds of sliced meat, and there are mini pancakes, hard boiled eggs, etc. almost anything you can think of for a German breakfast.
Accommodations - 4 stars. Quiet room, comfortable bed, temperature control. The shower is small, and the towels weren't great, but overall it was fine. Clean, they give you a kettle and some tea bags (and powdered coffee if you drink it). There's an Apotheke and a small grocery store about a block away. Close to the subway and several bus lines.