Two areas of improvement:
Opening the SPA at 10am is a bit late for those who wish to go for a swim before breakfast! It is virtually impossible to have both unless you prefer to swim with a full belly.
Finally, we checked out on Sunday, 9/25, by also paying the parking ticket. Nobody at the reception asked us, where we are planning to go. This would have been an invaluable question, as the entire Berlin City was "trapped" due to the marathon and there was only ONE way out (took us 90 min. (!!!) to figure it out, no guidance whatsoever in the city). If the receptionist would have asked and provided guidance, how to get out of the maze, this would have been very considerate and helpful, instead, we just paid the ticket - no info, no question from the receptionist whatsoever. Service of "suboptimal" quality.