The front desk is unmanned, you check in online, and there is no one in the hotel from afternoon till breakfast. This means you can't leave your luggage after you check out, or if you arrive anytime before 3 pm.
If you ask about luggage, they tell you go to Alexanderplatz, which they say is 5 minutes away. Not with luggage it's not!
Plus, the lift is up a flight of stairs, this would be a big problem for a disabled person, or one with big luggage. A
In their marketing, it is not disclosed there is no one available for most of the day, nor the fact that the elevator is up a flight of stairs. .