Horrible experience. Kids working the counter who are more busy talking to their friends, sending snaps and dressing unprofessionally - then helping the guests. Rude and unprofessionall management.
Rooms are inspired by those furniture stores you never understand how are not bankrupt, smells like a BMWs wonderbaul collection and the toilet paper is "2ply" but the cheapest kind.
Breakfast must be the worst I've experienced at any hotel, let alone a 4 star (this hotel brands themselves as a four star - BUT BE AWARE - it is more like a two star, at best).
Location is "OK" within Berlin, but physically it's in-between a 6 road crossing. No grocery store, convenient store or kiosk that will accept credit cards near by, and no ATM that doesn't charge horrible fees either.
Coffee in the lounge was garbage, might I add.
Water from the tap is basicly undrinkable, water bottles are crazy expensive, showerhead was "chalked" and not nice.
Save the money - stay away!