Staff at the desk was very nice. But the room's air conditioning did not work great, it never got cool which made it difficult to sleep in the summer. It also wasn't really a break from the heat of the outdoors when needed. I know it's Germany, and AC is like nowhere to be found but I booked specifically because it had AC listed. Also, the fridge was warmer than the room. So... made it so we couldn't even really get cold drinks to cool down either. They were good about giving us some ice, but I feel like the fridge should you know, refrigerate.
That said, hotel is in a great location near Bahnhof and Stadtmitte. I'm not sure I wouldn't try another hotel nearby that might have better ac, but this option would be fine probably another time of year.