Mercure Berlin Wittenbergplatz is one of the very best hotels in Berlin it is a small 4 star hotel, but it is great! The bedrooms are great (the bed is small, but the room it okay), the shower is awesome! The TV support Chrome Cast and Multicast are good. The staff is very friendly, nice and helpful. They have a free internet and there is an empty minibar where you can put your food\drinks. There is a breakfast with pay, but you don't need it, because of the location, it is located near the KeDeWe, all around there are Super Markets, Bakeries and shops. It just crosses the U-Bahn station. The price was very good, I booked directly via the hotel site and got a great price!