The location of the hotel is great because of proximity (300 m) to one of the most central parts of Berlin (Zoologischer Garten). The lobby and the restaurant are nice and look posh on the pictures, but the rooms are quite simple and a bit tired. Our shower stand (no bath tub) was leaking and hotel's carpeting was rather dirty (especially in the hallways).
We took a business-deal room with WiFi included in the price, with breakfasts in a separate room (same food though), and coffee-tea and fruits free of charge all day long.
The staff was helpful although there was nothing special - we didn't get the feeling we were welcome at the hotel. At some point they said that our room wasn't going to be ready by 3 PM in order to check in, but they were still able to provide a room a few minutes before (we arrived at 7 AM and really needed a room already - everywhere else in Berlin we have been able to get a room way before the check-in hour).
Overall - nothing especially positive, but nothing particularly bad either.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC