Stayed at the Mercure for five days. Room was clean; with double bed, TV, private WC and shower, and a fridge in which we could put SOME of our stuff. Breakfast buffet would have been an extra 13E per person. Location was only half a block from the entrance to the Gleisdreick U-Bahn station, thus convenient to most of the sites in Berlin Mitte. Staff was courteous and professional. Made reservation through Hotels.Com and had no problem with check-in or the final bill. Probably could have saved a couple euros by reserving directly through Mercure.Com.

Neighborhood was adjacent to a campus, with almost no other businesses within quick walking distance. There was a bar / restaurant in the hotel, a small bar a block or so away, and a gas station a few blocks beyond that. As such, the hotel is VERY quiet. However, if you looking for a party neighborhood, or a restaurant near the hotel; or even a place to buy anything; you will have to walk several blocks.