I like the Hilton Berlin. Not only will you most likely get a room overlooking a marvelous cathedral, the rooms are fantastic, the beds super-comfortable, the lounge / piano bar cozy and inviting, and the hotel is right on top of a subway station. You can't beat the location for convenience to shopping, restaurants and nightlife, and did I mention how comfortable the bed was?

If you are Gold they will upgrade you or throw in some kind of free and useful benefit.