The hotel is well-located, right next to the Rathaus tram and subway station, which puts it a mere 10 minutes walk from the museumsquartier or the parliament. It's well kept and clean, beds are comfortable, the showers are good.
But the service is not up to par. On our first night, we had a door hanger opting to give up having the room cleaned the next day in exchange for a beverage or donation. Quite nice, but after the first night, it never showed up again. The shower soap ran out on the second night, something else that we never saw again. And once during the stay, we got no bathroom mat.
These are all small, easily corrected mistakes: I could certainly ask for a floor mat or soap in the reception. It's just a bad look for an otherwise great hotel. All things considered, I'd probably return.