Stayed last weekend for 2 nights as a couple in a M-room.
We really enjoyed our stay but not everything was perfect.
The room: we stay in a lot of hotels (between 80-120 nights every year) so we have a lot to compare with. We consider the room to be 5* level, a very comfortable bed, nicely designed, lovely shower and Toto toilet and AC that works well (we find this very important). We had a room at the back so it was also very quiet. To be short: we absolutely loved the room! Unfortunately the coffee (2 nespresso cups when we arrived: one normal and 1 decaf.) wasn't refilled, also the 1 water bottle that was there on arrival wasn't replenished after the first night...?
Hotel design: we loved it, we are a bit of design freaks ourselves so it was nice to see many beautiful features, lovely furniture, photos etc. Fascinating to see how everything was put together.
Hotel location: perfect for tourists with the main shopping area, train station and Altstadt within easy reach. Tram stop in front of the hotel.
Breakfast: Unfortunately this was a disappointment for us, what they offer is far too limited and was exactly the same 2 days in a row. We always look forward to our breakfasts when we are in Germany but this was the first time that our expectations weren't met. The hotel offers a table service continental breakfast but the quantity/variety of what was offered was extremely limited (tiny pieces of cheese and cold cuts, no egg dishes apart from a (cold) hard boiled egg)