The hotel and the room are fresh and very clean, which is great! Unfortunately, there is no WiFi access in the room (at least the one I had) and this in the 21st century.... A very unpleasant surprise if you are on a business trip.
The room also didn't have a mini fridge despite the allocated cabinet..... Yet another peculiarity..
Also no air-conditioning, which can be a problem in Hamburg in the summer when the days are hot and humid.
Finally, the stuff at the desk wasn't very indifferent - neither friendly, nor unfriendly, they seemed like they don't care. I complaint about the WiFI, the reaction was "ah, that is surprising, we will check it" but nothing changed for the rest 4 days....
To top it all the cleaning personal was also quite annoying. On my rest day, they nocked on my door 10 times (well clearly there is someone in, if you cannot unlock the room). They were gone the moment I got to the door. There wasn't a do not disturb sign in the room....
So overall, this could be a quite reasonable hotel to stay at if they would fix their WiFi and get the personal to be more guest accommodating.