This is a nineteenth century hotel with a splendid facade. The rooms are also nineteenth century, though with double glazing, and have different shapes and sizes. The big drawback with the rooms is lack of air conditioning. My room was at 25oC and opening the window seemed to have little effect. In any case, the window had to be shut at night because of traffic noise outside.
On the plus side, the staff were very helpful and nice, breakfast was included and was good. The restaurant is fairly basic, but the food in the evening was tasty. Best of all, there is an outdoor eating/smoking area underneath the arches at the front of the hotel, providing excellent cover and extending the restaurant seating area by about 100%. Smoking rooms are also available.
The nearest U-bahn station is about 250m away and tram stops are even nearer.

No AC. Rooms are very hot despite windows
Supply in room for 2 persons were
One pillow, had to ask for second pillow, no wash towels, bare minimum towel supply and minimal soap provided one thin soap and one bath shower shampoo combo, 30ml
TV is very small 20 inch, size, not a flat screen, old style from the 80's

carpet is very dirty, stair rails dirty and sticky, single room is very small, like a cell.

I stayed here for a week in August of 2012. The hotel has benefited from a major, recent renovation, yet maintains historic charm. For an inner city hotel, my room was good size.
Sound insulation seems above average, as are elevator access (3 fairly quick elevators) and bathroom fixtures. Breakfast is buffet style with more choices than usual and with some variation from day to day. One can take this meal inside or, as I did on every day, outside on the terrace nearly in the shadow of the twin-towers of the neighboring Votive Church. Service was consistently professional, friendly ad first-rate. The location is very convenient, being walking distance to such landmarks as the Rathaus and the historic center. A short walk through the park in front of the hotel takes you to the public transport station with connection to several buses and trams as well as the U2.